A Survey of Domestic Electronic Digital Computing Systems


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Manufacturers with names starting with T through Z


                             TECHNITROL-180

TECHNITROL-180
Technitrol 180

MANUFACTURER
Technitrol Engineering
2751 North 4th Street
Philadelphia 33, Pa.

GENERAL SYSTEM                                       STORAGE                            Microsec
Application General Purpose Computation               Media                 Words        Access
Timing      Synchronous                               Acoustic Quartz        512         384 max
Operation   Sequential                                Magnetic Tapes                     100
NUMERICAL SYSTEM                                      Acoustic Quartz delay lines store 24,576 bits.
Internal number system  Binary                       Magnetic tapes are low speed.
                                                     Acoustic Quartz has 448 words in 8-word loops an
Binary digits per word   48                             and 64 words in one word loops.
Binary digits per instruction 48                     Seven tape positions are available.
Instructions per word	1
Total no. of instructions used  40                   INPUT
Arithmetic system	Fixed-Point                        Media                              Speed
Instruction type-Four Address	Code                   Magnetic Tape                5000 Char/sec
Number range +244 to -244                           Punched Paper 200 Char/sec(Ferranti
 Integral values                                       Photoelectric Reader)
ARITHMETIC UNIT                                      Manual Keyboard on	console
Add time (excluding storage access )48 microsec     OUTPUT
Multiply time(" " ")3,160 microsec                  Media                             Speed
Divide time (" " ")3,160 microsec                   Anelex Page Printer	400 Char/sec
Construction    Diode logic                         Punch Paper Tapes	200 Char/sec
Number of rapid access word registers 64            Automatic Typewriter(IBM) 8 Char/sec
Basic pulse repetition rate One megacycle/sec       Magnetic Tape             5000 Char/sec
Arithmetic Mode Serial
 64 one word "scat" storage physically
associated with storage section



NUMBER OF CIRCUIT ELEMENTS                          COST
Tubes 2,600                                         Approximate cost of basic system $500,000
Tube types 4                                        Additional equipment Variable
Crystal diodes 50,000
                                                    RELIABILITY AND OPERATING EXPERIENCE
CHECKING FEATURES                                   System is currently completing acceptance tests.
Fixed Marginal Checking
 Plug-in by plug-in controlled manually             ADDITIONAL FEATURES AND REMARKS
or automatically from console.
  Optional - Programmed Checks.                     Flexibility achieved by block type of
                                                    construction. Instruction code and number
                                                    base are flexible. Capacity can be
PHYSICAL FACTORS                                    increased at later dates.
Power consumption, Computer 50 K.W.
Space occupied, Computer 600 cu ft 75 sq ft
Total weight, Computer 14,000 lbs
Power consumption, Air Cond. 20 K.W.
Space occupied, Air Cond. 550 cu.ft. 50 sq ft
Total weight, Air Cond. 4,000 lbs
Capacity, Air Cond. 20 tons

MANUFACTURING RECORD
Number produced	1
Number in current operation 1
Delivery time	12 months
	Unit described is a general purpose large
scale digital computer made up of Technitrol
standard computer blocks. Three smaller
scale special purpose units are on order.



                             TELEREGISTER SPEDDH

TELEREGISTER SPEDDH

Special Purpose Electronic
Digital Data Handling

MANUFACTURER
The Teleregister Corporation
445 Fairfield Avenus
Stamford, Connecticut

GENERAL SYSTEM                                   STORAGE
Application Armed Services; manufacturing and	 Teleregister MAGNETR0NTC drums are built in
 transportation industries                       varying sizes as required. At present the largest
Timing Synchronous                               drum designed stores 1,500,000 bits.
Operation Sequential
 Teleregister systems are special purpose, designed     INPUT
to meet specific requirements of the government agency  On-line operation.
or customer concerned.
                                                        OUTPUT
NUMERICAL SYSTEM                                        On-line operation.
Internal number system Binary
Arithmetic System Fixed-point                           NUMBER OF CIRCUIT ELEMENTS
 Numerical system is variable.                          Varies

ARITHMETIC UNIT
Add time(excluding storage access) 1.5 microsec
Construction Vacuum-tubes
Number of rapid access word registers 1
Basic pulse repetition rate 20-100 killocycles/sec
Arithmetic Mode Parallel



CHECKING FEATURES                           PERSONNEL REQUIREMENTS
Fixed	                                      Varies
 Duplicate equipment for 24-hour service
applications                                RELIABILITY AND OPERATING EXPERIENCE
                                            Date first unit passed acceptance test June 1952
PHYSICAL FACTORS                            Operating ratio 0.998 of scheduled time.
Varies                                       No. of different kinds of plug- in units 45
                                             No. of separate cabinets(excluding power and air
MANUFACTURING RECORD                        cond.) Varies
Number produced 4	                         Systems operated by
Number in current	operation 4                American Air Lines, New York (Reservisor)
Number on order 3                           Toronto Stock Exchange(Bid-Asked Electronic
Delivery time 6-12 months                     Quotation System)
                                            Griffiss Air Force Base, Rome, New York
COST
  Varies

ADDITIONAL REMARKS AND FEATURES
 System used for 5 years in maintaining airline
available seat count.
Maintenance and air conditioning influenced by
unenclosed electronic rack construction.
 Twenty-four hours/day service
  Remote control


                             TIM-II



TIM-II
The Inventory Machine II

MANUFACTURER
Laboratory for Electronics, Inc.
75 Pitts Street
Boston 14, Massachusetts

GENERAL SYSTEM                                      STORAGE                           Microsec
Application Commercial, business data processing    Media                   Words        Access
Timing Synchronous                                  Magnetic Drum        Up to 76,000    150,000
Operation Sequential                                Magnetic Core                  10      7,000
 Floating address, variable word length.            Drums are available to store up to 240,000
                                                    dec dig. The drum rotates at 180 RPM.
NUMERICAL SYSTEM                                    The magnetic core storage stores 120 dec dig
Internal number system Decimal                        at a 50 kilocycles/sec rate.
Decimal digits per word Variable 1-12
Binary digits per instruction 8                     INPUT
Instructions per word 1                             Media                            Speed
Total no. of instructions decoded 25                Paper Tape                   10 dec dig/sec
Total no. of instructions used 25                   Keyboard                       Manual
Arithmetic system Fixed-point
Instruction type One-address code                          OUTPUT
Number range +- (lOll-1)                Media
                                                   Paper Tape                  14 dec dig/sec
ARITHMETIC UNIT                                    Adding Machine Printer      10 dec dig/sec
Add time(excluding storage access) 1500 microsec
Multiply time (" " ")1500 microsec/dd of           NUMBER OF CIRCUIT ELEMENTS
  multiplier                                       Tubes 180 in prototype
Divide time( )1500 microsec                        Tube types 6
Construction Vacuum-tubes and Magnetic elements.   Crystal diodes 1600 diodes
Number of rapid access word registers 3 plus 3     Magnetic elements 560
  accessible address registers plus an 18 word     More cores and diodes; fewer tubes in
  construction register.                             production unit (II).
Basic pulse repetition rate 50 kilocycles/sec
Arithmetic Mode Serial
  Instructions included for sorting, indexing,
and other logical processes, particularly important
in business data handling.



CHECKING FEATURES                             PERSONNEL REQUIREMENTS
Detection of unused 4-bit cores.              Daily Operation     Tech. or Operator
Drum read twice in each digit cell.           One 8-hour shift          1
PHYSICAL FACTORS                              RELIABILITY AND OPERATING EXPERIENCE
Power consumption, Computer 1.5 K.W.          Date unit passed test December 1954
Space occupied, Computer 50 cu ft 19 sq ft    After two months operating experience,
                                                  prototype operated approximately 4 hours
MANUFACTURING RECORD                          error-free.
Number produced 1 Prototype
Number in current operation 1                 ADDITIONAL FEATURES AND REMARKS
                                              Special features for filing or perpetual
COST                                          inventory problems.
Approximate cost of basic system - Between
 $20,000 and $30,000.


                             UDEC-I
UDEC-I
Unitized Digital
Electronic Computer

MANUFACTURER
Burroughs Corporation
Paoli, Pennsylvania

OPERATING AGENCY
Wayne University
Computation Laboratory
Detroit 1, Michigan

GENERAL SYSTEM                                    STORAGE                              Microsec
Application Scientific computing                  Media                      Words      Access
Timing  Synchronous                               Magnetic Drum               5500      8,500 (Avg.)
Operation Sequential                              9 digits plus sign in each stored word

NUMERICAL SYSTEM                                  INPUT
Internal number system Decimal                    Media                             Speed
Decimal digits per word 9                         Keyboard	  6 char/sec
Decimal digits per instruction 4                  Paper Tape	  200 char/sec
Decimal digits per instruction not decoded 4
Instructions per word 2                           OUTPUT
Total no. of instructions decoded Indefinite      Media                               Speed
Total no. of instructions used 25                 Printer                           6 char/sec
Arithmetic system Fixed-point                     Paper Tape	  60 char/sec
Instruction type Two-address code and One-address
 code                                             NUMBER OF CIRCUIT ELEMENTS
Number range Manually variable decinal setting	  Tubes 5,000
 Two address operation is optional for optimum	  Tube types 10
programming                                       Crystal diodes	5,000
                                                  Magnetic elements 192
ARITHMETIC UNIT                                   2000 of the diodes are used as logical
Add time(excluding storage access) 640 microsec    elements.
Multiply time( " " ") 4000 microsec
Divide time( " " ") 5600 microsec
Construction Vacuum-tubes
Number of rapid access word registers 2
Basic pulse repetition rate 125 kilocycles/sec
Aritbmetic Mode Serial



CHECKING FEATURES                                PERSONNEL REQUIREMENTS
Fixed. Modulo 3 check digit on all transfers.    Daily Operation No. of Eng. No. of Tech.
 Modulo 3 aritmetic check                        One 8-hour shift      1           2
 Forbidden combination-multiply or divide check. Two 8-hour shifts     2           3
                                                 Three 8-hour shifts   3           4
PHYSICAL FACTORS
Power consumption, Computer, 30 K.W.             RELIABILITY AND OPERATING EXPERIENCE
Space occupied, Computer 20 ft x 40 ft Room      Date unit passed acceptance test December 1955
Power consumption, Air Conxl. 2 K.W.             Average error free running period 6 hours
                                                 Operating ratio 0.85 Good time 5
MANUFACTURING RECORD                                            Attempted to run 6
Number produced 1                                No. of different kinds of plug-in units 6
                                                 No. of separate cabinets (excluding power and
COST                                               air cond.) 28 Racks.
Approxinate cost of basic system $250,000
 System available at $75/hr	

ADDITIONAL FEATURES AND REMARKS
UDEC will be modified to include serial-parallel
operation, a magnetic core storage of 1500 words,
a B-box, and magnetic tape. Storage access will be
88 microsec, the same as the basic add time. UDEC II,
installed and operated by the Burroughs Corporation
in Philadelphia is similar in construction and
logical design to UDEC I.


                             UDEC-II




UDEC-II
Unitized Digital
Electronic Computer

MANUFACTURER
Burroughs Corporation
Paoli, Pennsylvania

OPERATING AGENCY
Electronic-Instruments Division
1209 Vine Street
Philadelphia, Penna.

GENERAL SYSTEM                                        STORAGE                            Microsec
Application Scientific and business application       Media                       Words   Access
Timing    Synchronous                                 Magnetic Drum                5500   8500 (Avg.)
Operation Sequential                                   55,000 decimal digits total storage.
NUMERICAL SYSTEM                                      INPUT
Internal number system Excess-three binary coded      Media                             Speed
 decimal plus sign.                                   Paper Tape (2 photoreaders)         120 char/sec
Decimal digits per word 9                             Paper Tape (2 teletype)               6 char/sec
Decimal digits per instruction 5
Instructions per word 2                               OUTPUT
Total no. of instructions decoded 40                  Media                             Speed
Total no. of instructions used 52                     Paper Tape (4 teletypes)              6 char/sec
Arithmetic system Fixed-Point                         Any one of 4 may be chosen by programing.
Instruction type One-address code                     Teletype Hi-speed Punch will be installed
Number range Movable decimal point                          60 char/sec.
 Two-address word possible if second instruction
in each word is unconditional transfer.               NUMBER OF CIRCUIT ELEMENTS
                                                      Tubes 5,000
ARITHMETIC UNIT                                       Machine consists of Burroughs Pulse Control
Add time(excluding storage access) 680 microsec       Equipment, approximately 600	units in all.
Multiply time(" " ") 50,000 microsec
Divide time(" " ") 50,000 microsec
Construction Vacuum-tubes
Basic pulse repetition rate 125 kilocycles/sec
Arithmetic Mode Serial-parallel



CHECKING FEATURES                                     PERSONNEL REQUIREMENTS No. of Tech
Fixed Transfer check modulo 3                         Daily Operation	No. of Eng.	or Operators
 Overflow, halt, and multiplication-division alarms.  One 8-hour shift       1         5
                                                      Two 8-hour shifts      2         4
PHYSICAL FACTORS
Power consumption, Computer 55 K.W.                   RELIABILITY AND OPERATING EXPERIENCE
Space occupied, Computer 51 racks                     Date first unit passed acceptance test Oct. 55
Capacity, Air Cond. 15 tons                           Average error free running period 6 hours
                                                               Operating ratio 0.85
MANUFACTURING RECORD                                  No. of separate cabinets(excluding power and
Number produced 2                                        air cond.) 51
Number in current operation 2
Delivery time 6 months                                ADDITIONAL FEATURES AND REMARKS
 UDEC I located at Wayne Univ., Detroit, Michigan	 B-box
 UDEC II located at Burroughs Corporation, Phila, Pa,	 Overflow transfer instruction
                                                       Provision for additional equipment and modificatior
COST                                                  of logic.
Approximate price of basic system $200,000
Additional equipment $100,000.


                             UNIVAC

UNIVAC
Universal Automatic Computer

MANUFACTURER
Remington Rand Division
Sperry Rand Corporation
515 Fourth Avenue
New york 10, N.Y.

OPERATING AGENCIES
The following agencies
supplied survey information:
Armr Map Service
Washington 25, D.C.

AEC Computing Facility
New York Univ.,N.Y.

Radiation Laboratory
Univ. of California
Livermore, California

Department of the Air Force
HQUSAF Washington 25, D.C.
Attn:	DOS Comptroller

EQ Air Material Comoand
Wright-Patterson AFB, Ohio

Pictures were furnished by
the USAF and the Univ. of
California, RL.

GENERAL SYSTEM                                    ARITHMETIC UNIT
Application General Purpose, Mapping, Geodesy,    Add time(excluding storage access) 120 microsec
 Research and services in mathematical sciences,	Multiply time(" " ") 1800 microsec
 AEC reactor design problems. Weapons development.	Divide time (" " ")  5600 microsec
 Air `Force Progranning Computations.              Construction Vacuum-tubes
 Logistical business-type problem solution        Number of rapid access word registers 4
Timing Synchronous                                Basic pulse repetition rate 2.25 megacycles/sec
Operation Sequential                                Multiply and divide times depend upon numerical
                                                  value of multiplier, dividend, and divisor respect-
NUMERICAL SYSTEM                                  ively.
Internal number system Decimal                    All quantities processed by the computer are in
Decimal digits per word 11 plus sign 12 alphanumeric     units of 11 digits plus a sign. Time includes
Decimal digits per instruction 6                  simultaneous computation in duplicate circuits
Decimal digits per instruction not decoded 1      and comparison of results for identity.
Instructions per word 2
Total no. of instructions decoded 65             STORAGE                                 Microsec
Total no. of instructions used 45                Media                      Words Digits Access
Arithmetic system Fixed point                    Acoustic Delay Line-Hg     1000  12,000    400 max
Instruction type One address code                Magnetic Tape           120,000 1,440,000
Number range -l to +1                            1,5OO foot magnetic tapes are used.
 Floating point performed by subroutines supplied
with computer.
 Words may be made up of alphabetic, numeric and
typewriter characters.
 JAMS and IJSAF report 64 and 46 instructions decoded
and 40 and 46 instructions used, respectively.


INPUT                                               OUTPUT
Media/Speed                                         Media/Speed
Magnetic Tape 12,800 char/sec. read-in speed        Magnetic Tape 12,800 char sec with speed
     100 inches/second                                  100 inches/ sec
  Metallic tape l/2" wide in lengths of 100, 200,       Recorded at 128 char inch
500 or 1500 feet, recorded at densities of 20, 50,      Output Equipment using Magnetic tape input:
120 or l28 char, inch.                              Uniprinter 10-11 char/sec
  Input Media are prepared by:                        Converts recording on magnetic tape to desired
Unityper I    Keypunching                           printed format.
  Records at 20 char/inch. Loop controlled. When    High Speed Printer  600 lines/mins. adjustable to 
used with Printing Unit produces printed copy.      200 and 400 if desired
Unityper II Keypunching                               120 char/line: 130 char/line maximum with repeti-
  Reccords at 20 char/inch. Printed copy produced   tion of characters.
simultaneously.                                     Punched Card Printer Delivery - October 1956
Card-to-Tape-Converter 240 cards/mm. instantaneous    Will print on both sides of a card and will
  conversion                                        punch the card.
  80 column punched card input 120 char/inch.       Tape-To-Card Converter 12O - cards/min.
90 Column Card-to-Tape-Converter 240 cards min.       Converts magnetic tape recording to 80
  90 column punched card input 120 char/inch.       column punched cards. Detachable plugboard
Tape Operated Unityper IT (prototype) 6-10 char/sec.	provides for field rearrangement.
  Converts 5 channel punched paper tape to 7 channel	Tape to 90 column Card Converter - Delivery 8 months
(plus sprocket channel) magnetic tape recording.	  Converts to 90 column punched cards: otherwise
Punched Paper Tape to Magnetic Tape Converter         similar to Tape-To-Card Converter
  200 char/sec.                                     Rad Lab - Buffer storage Hg 3500 microsec/60 words.
 High Speed Conversion.                             UASG-AMC- Typewriter not used for normal input-output. 
input-outrm
  Magnetic Tape Recording of Unityper II verified by:
Verifier Keypunching
 Verifies original recording; provides for correcting
mistakes on original recording; produces printed
copy simultaneously with the other two functions.
  Magnetic tape recording of Card-to-Tape Converters
verified internally.


NUMBER OF CIRCUIT ELEMENTS                              The first UNIVAC System was placed in operation
Tubes 5,400	                                            for the United States Bureau of Census in March, 1951.
Tube types 15                                           Since then fourteen other UNIVAC Systems have been
Crystal diodes 18,000                                  installed. Listed below are the users and future
 AMS reports 7 main types of tubes im Central computer.	users of the System.
  USAF-HQ 12 main types of tubes.
CHECKING FEATURES                                      Department of the Air Force, Office of the
Fixed Parity check throughout system, character        Air Comptroller, Washington, D.C.
count of each block on input and output, parallel      Department of the Army, Corps of Engineers
computing, automaAc reread.                            Army Map Service, Washington, D.C.
                                                       Atomic Energy Commission
PHYSICAL FACTORS                                       New York University, New York
7over consumption, Computer 124.5 KVA                  Atomic Energy Commission, Radiation Laboratory
Space occupied, Computer 1000 sq ft                    University of California, Livermore, California
Total weight, Computer 29,853 lbs                      Department of the Navy, Bureau of Ships
Capacity, Air Cond. 35 tons                                Washington, D.C.
  Figures quoted are for the central computer with	Remington Rand Inc. UNIVAC Service Bureau
power supply, supervisory control desk, and 10             New York, New York
Uniservos I. User provides air conditioning unit of   General Electric Company, Major Appliance Division
own choice. Room air conditioning not included.            Louisville, Kentucky
HQ-USAF-DCS reports air conditioner requires 35 K.W.  Metropolitan Life Insurance Co. New York, N.Y.
at 28,000 ft3 of air/min.                            Air Materiel Command, Wright-Patterson Air Force Base,
                                                            Dayton, Ohio
MANUFACTURING RECORD                                  United States Steel Corp. National Tube Division
Number produced 22                                       Pittsburgh, Pennsylvania
Number in current operation 22                        E.I. duPont de Nemours Co. Wilmington, Delaware
                                                      Bureau of the Census, Department of Commerce, Wash. D.C.
                                                      United States Steel Corp, Gary Works Gary, Indiana
                                                      Franklin Life Insurance Co. Springfield, Illinois
                                                      Westioghous Electric Corn. Pittsburgh, Pennsylvania
                                                      Pacific Mutual Life Insurance Co. Los Angeles, Cal.
                                                      Sylvania Electrical Products Inc. New York, N.Y.
                                                      Chesapeake & Ohio Railway Co. Cleveland, Ohio
                                                      Consolidated Edison Co. of N.Y., inc. Commercial
                                                      Relations Department, New York, N.Y. (two)


COST                                                  PERSONNEL REQUIREMENTS
The approximate price for the basic system,           Daily Operation	Engr	Tech. Oper.
including the Central Computer with Power Supply,	Sperry Rand reports:
Supervisory Control Desk and 10 UNISERVOS I is        One 8-hour shift     1    3     2
$950,000.                                             Two 8-hour shifts    1    4     4
 There is a wide choice of auxiliary and peripheral   Three 8-hour shifts  2    5     6
equipment from $4500 for a UMTYPER II to $185,000        AEC-NYU Reports:
for a High Speed Printer.                             Three 8-hour shifts  7   15  (incl oper)
 The rental rate for the basic system described         The size of engineering staff is not based on
above is $16,200 per month for a 1 shift, 5 day,      the minimal requirements of operation; rather it
40-hour week,                                         must provide sufficient reserve to maintain
 The rental rate for additional equipment varies      operations if one or two people leave and their
from $90 per month for a UNITYPER II to $5,500        replacements have to go through a six-month
per month for a High Speed Printer for a 1 shift, 5   training.
day 40-hour week.                                      HQ-USAF- DOS Reports:
 Monthly rentals increase with each additional           The machine is operated for three 8-hour shifts
40-hour shift in a 5 day week and include installation   and 7 Engineers are required. All personnel
maintenance, service and parts. Monthly rentals and    servicing the computer are of graduate engineer
prices, quoted are f.o.b. factory, and do not include  caliber. Technicians or operators are used.
taxes or site preparation and are sub.ject to change.  Rad Lab. Reports:
 Rad Lab quotes the following prices paid for            The machine is operated for three 8-hour shifts
equipment:                                             and 7 days per week. Six engineers and 8 tech-
 High Speed Printer (78,000 char/sec) $150,000         operators are required.
 Plotter (1 pt/sec)                     22,000
 UNIPRINRERS (2)                        56,000
 UNITYPER (1)                           18,000
 UNISERVOS (10)                        180,000
 AEC quotes approximate price paid was $1,000,000
for basic system.



RELIABILITY AND OPERATING EXPERIENCE                 ADDITIONAL FEATURES AND REMARKS
Date unit first passed accentance test March 1951    Speery Rand Reports:
No. of different kinds of plug-in units 250            Major Automatic Programs
No. of separate cabinets(excluding power and air       A-2 Compiler
  cond.) 2                                             BIOR-Business In-Out Rerun Compiler
Sperry Rand:                                           General Purpose Compiler
 Good time 90% Attenpted to run 40-144 hours           Data Processing Compiler (B0)
AEC-NYD:                                               GeneralŮzed systems of computation such as
 Good time 150 hours attenpted to run 156 hours.     Matrix Math Routines, Linear Programing, Statistical
HQ-USAF-DCS:                                         Analysis. Complete built-in buffering of input-output.
 Unit passed acceptance test in Jan 1952. Based      Wide range of auxiliary and peripheral equipment
on 100%, the following fIgures apply: Production     in customer use.
time 67%, Preventive Servicing 17% and Down Time 10%.	 Maintenance service available under separate
Rad Lab.                                             maintenance contract to purchasers of UNIVAC equipment.
 Unit passed acceptance test on 10 April 1953.       Complete courses available for training customer
The average error free running period has been 8.7 hrs.  personnel in programing, operating and maintenance.
Good time 1802 hours. Attempted to Run Time 1953 hrs.   Rad Lab Reports:
or 92.5%. Good tine = Total time - Engineering       Alpha numeric decial system, complete arithmetic-
Maintenance - Machine Down time,                     checking, multiword registers, 10 UNISERVOS, and
AMS                                                  automatic reread on tape units are in use.
  Unit passed acceptance test on 32 April 1952.      AMS reports:
Good Time 11,618 Hours. Attempted to Run 14,509 his.   The machine has the ability to handle alphabetics,
from 1 Jan 55 to 1 Feb 55. Operations are based on   and is completely self-checking. Success has been
an error free running period of about 45 mInutes.    achieved in reading from or writing on magnetic tapes
Reading and writing on magnetic tapes is the         during operations.
principle source of error.


                             UNIVAC-II


UNIVAC-II
Universal Automatic
Computer II

MANUFACTURER
Remington Rand Division
of Sperry Rand Corporation
515 Fourth Avenue
New YorklO, N.Y.

GENERAL SYSTEM                                    STORAGE                               Microsec
Application General Purpose                       Media                  Words           Access
Timing Synchronous                                Magnetic Core         2,000-10,000     40/word
Operation Sequential                              Magnetic core storage totals 12,000 to 120,000
                                                     dec digits.
NUMERICAL SYSTEM                                 Input-Output magnetic tapes can be used as
Internal number system Decimal                   additional storage. 2,880,000 digits per 1535
Decimal digits per word   ll plus sign;              foot reel.
  12 alphanumeric
Decimal digits per instruction 6                  INPUT
Instructions per word 2                           Media                           Speed
Total no. of instructions decoded 65              Magnetic Tape 20,000 char/sec
Total no. of instructions used 45                 Metallic tape 1535 ft long.
Arithmetic system Fixed-point                     See UNIVAC I description equipment preparing
Instruction type One-address code                 magnetic recording.
Number range -l to + 1                            UNISERVO II is used for reading magnetic tape
 Floating decimal performed by subroutines        to UNIVAC II.
supplied with the computer.
                                                  OUTPUT
ARITHMETIC UNIT                                   Media                           Speed
Add time(excluding storage access) 120 usec	Magnetic Tape                20,000 char/sec
Multiply time(" " ") 1800 microsec              UNISERVO II is used for recording from UNIVAC II.
Divide time (" " ")  5600 microsec              See UNIVAC I description for output equipment using
Construction Vacuum-tubes                       magnetic tape input.
Basic pulse repetition rate 2.25 megacycles     Recording density of 200 char/inch
Arithmetlc Mode Serial
Multiply and divide time includes simultaneous	    NUMBER OF CIRCUIT ELEMENTS
computation in duplicate circuits, comparison of    Tubes 4,400
resultsfor identity and is dependent upon the       Tube types 15
numerical value of multiplier.                      Crystal diodes 18,000
                                                    Magnetic elements 200,000 to 1,000,000
                                                    Transistors 500


CHECKING FEATURES                                   COST
Parity check.                                       The approximate cost of the basic system,
 Character coumt of each block on input and         which includes the Central Computer Group and
output.                                             Computing 10 UNISERVOS II is $1,025,000. The monthly
Parallel Computing                                  rental rate for basic system for 1 shift, 5
Automatic re-read                                   day, 40-hour week is $22,500.
                                                    See UNIVAC I for price and rental rates of
PHYSICAL FACTORS
Power consumption, Computer 100 K.V.A.              additional equipment.
                                                    Monthly rentals increase with each additional
Space occupied, Computer 1,000 sq ft                40-hour shift in a 5 day week and include
Total weight, Computer 25,000 lbs.                  installation, maintenance service and parts.
Capacity, Air Cond. 28 tons                         Monthly rentals and prices quoted are f.o.b.
 The above figures are for the central computer     factory. They do not include taxes or site
with power supply, supervisory control desk and     preparation and are subject to change without
10 UNISERVOS II. User provides air conditioning     notice.
unit of own choice. Room air conditioner not
included in 28 tons above.                          PERSONNEL REQUIREMENTS
                                                    Daily operation  Engr  Tech. Oper.
MANUFACTURING RECORD                                One 8-hour shift   1    5     2
Number produced Modification of UNIVAC              Two 8-hour shifts  1    4     4
Number in current operation See UNIVAC I            Three 8-hour shifts 2   5     6
Delivery time 18 months	                            These requirements may increase with
 All UNIVACS I subject to modification to II.       additional peripheral equipment.


RELIABILITY AND OPERATING EXPERIENCE
See data on UNIVAC I

ADDITIONAL FEATURES AND REMARKS
See UNIVAC I
All UNIVAC I programs applicable on UNIVAC II.

Complete compatability with UNIVAC I.


                             UNIVAC-SCI (ERA-1101)

UNIVAC-SCI
(ERA-1101)

Engineering Research
Associates 1101

MANUFACTURER
ERA Division
Sperry-Rand Corporation
5150 Fourth Avenue
New York 10, N.Y.

OPERATING AGENCY
Rich Electronic Computer Center
Engineering Experimental Station
Georgia Institute of Technology

GENERAL SYSTEM                                        STORAGE                          Microsec
Application Educational, Industrial Commercial, and   Media              Words           Access
 Governmental.                                        Magnetic Drum     16,584           17,000 max.
 All data herein supplied by Georgia Tech.                                                   32 min.
Timing Asynchronous
Operation Sequential                                  INPUT
 Computer system picture supplied by Georgia Tech.    Media                          Speed
 Drum picture supplied Sperry Rand Corp. E.R.A. Div.  Photoelectric Tape Reader	55 words/sec
                                                                                   140 frames/sec
NUMERICAL SYSTEM                                                                    70 ft/min
Internal number system Binary
Binary digits per word 24                             OUTPUT
Binary digits per instruction 24                      Media                           Speed
Instructions per word 1                               Teletype Paper Tape           60 char/sec
Total no. of instructions decoded 48                  Flexowriter                   10 char/sec
Total no. of instructions used 43
Arithmetic system Fixed                               NUMBER OF CIRCUIT ELEMENTS
Instruction type One-address code                     Tubes 2,695
Number range l-223 to 223-l                           Tube types 18
 Negative numbers used are in the ones complement     Crystal diodes 2,585
arithmetic. +5 = 00000005 and -5 = 77777772 octal.
                                                      CHECKING FEATURES
ARITHMETIC UNIT                                       Fixed Improper command stops the machine.
Add time(excluding storage access) 5 microsec
Multiply time(" " ") 260 microsec
Divide time  (" " ") 524 microsec
Construction Vacuum-tubes
Basic pulse repetition rate 400 kilocycles/sec
Arithmetic mode Parallel



PHYSICAL FACTORS                                     Function Evaluation Subroutines
Power consumption, Computer 15 K.W.                     u = Log2y
Space occupied, Computer 2880 cu ft 560 sq ft           u = Logey
Total weight 16,000 lbs.                                u = Log10y
Type air conditioner Gas                                u = 2y
Space occupied, Air cond. 1024 cu ft 128 sq ft          u = sin y
Capacity 5 tons                                         u = Arcsin y
                                                        u = Arctan y
PERSONNEL REQUIREMENTS                                  u = Sqrt (y)
Daily Operation	Engr	Tech or Oper                  
One 8-hour shift   2          2                       
RELIABILITY AND OPERATING EXPERIENCE                   
No. of different kinds of plug-in units 52
No. of separate cabinets(excluding power and         Floating Point Subroutines
 air cond.) 5                                          Floating Pt Add
                                                       Floating Pt Multiply
ADDITIONAL FEATURES AND REMARKS                        Floating Pt Divide
Large library of subroutines, including the            Scale Factor
 following Input-Output Subroutines.
 Fixed Point Decimal Input                           Utility Routines
 Fixed Point Decimal Output
 Floating Point Input                                  Storage Dump
 Floating Point Output                                 Check Point
                                                       Translating Routine
                                                       Clear Storage
                                                       Print-Code to Bi-Octal Conversion.






                             UNIVAC-SCI (ERA-1102)




UNIVAC-SCI
(ERA-1102)

Univac Scientific
Engineering Research
Associates ll02

MANUFACTURER
Engineering Research Associates
Division of Remington Rand

OPERATING AGENCY
ARO, Inc. Operating Contractor
Arnold Engineering Development Center
ARDC-USAF-Tullahoma, Tenn.

GENERAL SYSTEM                                        STORAGE                         Microsec
Activity of organization Engineering Development      Media                 Words       Access
Application Data reduction in Wind Tunnel and         Magnetic Drum         8,192      8500 max
 Engine Test Facilities.                                Drum storage totals 196,608 digits.
Timing Synchronous
Operation Sequential - Sequential Input-              INPUT
Computers will be used on-line during wind-tunnel     Media                            Speed
 tests                                                Tape Reader                 200 lines/sec
                                                      Raw Data Scanner Scans 250 channels in ll sec
NUMERICAL SYSTEM                                      The raw data scanner is connected to transducers
Internal number system Binary                         measuring test data.
Binary digits per word 24
Binary digits per instruction 24                      OUTPUT
Octal digits per instruction not decoded 8            Media                            Speed
Instructions per word 1                               Automatic typewriter 10 char/sec
Total no. of instructions decoded Depends upon        Automatic plotter
 program
Total no. of instructions used 2                      NUMBER OF CIRCUIT ELEMENTS
Arithmetic system Left Circular Shift                 Tubes 2700
Instruction type One-address Code                     Crystal diodes 5000
Number range Accumulator holds 48 binary digits.      Magnetic elements 700 relays

ARITHMETIC UNIT
Add time(excluding storage access) 17 microsec max
Multiply time(excluding storage access)264 "  "
Divide time(excluding storage access)540   "  "
Construction Vacuum-tubes
Number of rapid access word registers 1
Basic pulse repetition rate 500 kilocycles/sec
Arithmetic mode Parallel



CHECKING FEATURES                                     PERSONNEL REQUIREMENTS
Fixed Accumulator overflow indicator, "Oversize       Daily operation   No. of Eng No. of tech.
  quotient" check, improper operation code check,	One 8 hour shift     5          2
  address check on tape loading.                          Above totals are for one computer.

PHYSICAL FACTORS                                      RELIABILITY AND OPERATING EXPERIENCE
Power consumption, Computer 22 K.W.                   Date first unit passed acceptance test -
Space occupied, Computer 772 cu ft 122 sq ft          Acceptance tests currently being run
Total weight, Computer 14,000 lbs                     Operating ratio 0.85
Power consumption, Air cond. 9 K.W.                   No. of different kinds of plug-in units 47
Space occupied, Air cond. 80 cu ft 12 sq ft           No. of separate cabinets (excluding power and
Total weight, Air cond. 5000 lbs                         air cond.)  3
Capacity, Air Cond. 25 tons
                                                      ADDITIONAL FEATURES AND REMARKS
MANUFACTURING RECORD                                  All three computing systems are at USAF - Air
Number produced 5                                      Research Development Command, Tullahoma, Tenn.,
Number in current operation 3                         and will be used for on-line data reduction in
Delivery time 31 months                               engine test and wind tunnel facilities.

COST
Three computing systems were developed and
manufactured under CPFF Contract. Total cost
is about 1.4 million dollars.


                             UNIVAC-SCI (ERA-1103) (ERA-1103A) 



UNIVAC-SCI
(ERA-1103)
(ERA-1103A)
Universal Automatic Computer
Scientific Engineering
Research Associates 1105-ilOSA

MANUFACTURER
Engineering Research Associates
Division of Sperry-Rand
515 Fourth Avenue
New York 10, N.Y.

OPERATING AGENCY
White Sands Proving Ground
New Mexico

GENERAL SYSTEM                                    STORAGE                               Microsec
Application Scientific (On-Line and Off-Line)     Media                Words              Access
Timing Synchronous                                Magnetic Core         4096, 8192            8
Operation Sequential                                                    or 12,288
 Pictures furnished by WSPG.                      Magnetic Drum         16,584           17,000 (Avg.)
                                                  Magnetic Tape       400,000/Reel
NUMERICAL SYSTEM                                     Above is for 36-bit words. From 1 to 10 tape
Internal number system Binary                     units may be used. Read-write time on tapes 2100
Binary digits per word 56                         words/sec. Core storage can be furnished in 1, 2
Octal digits per instruction 2                    or 5 banks of 4,096 words each, all core, drum,
Binary digits per instruction not decoded 6       accumulator and Q-registers are directly addressable.
Instructions per word 1                           WSPG Computer has l024, 36 binary digit words of
Total no. of instructions decoded 48              electrostatic storage, as originally furnished by ERA.
Total no. of instructions used 46
Arithmetic system Fixed-point                     INPUT
Number range +235-1 to -235 - 1                   Media                               Speed
A 36-bit word consists of a 6 bit (2 octal        Magnetic Tape          2100 words/sec
digit) code, a 15 bit "W-address" and a 15 bit    Paper Tape             200 frames/sec
"V-address". In some commands the 50 address      Card                   120 cards/min
bits have other special meanings.                  6 frames 1 word
                                                   80 or 90 column cards are available.
ARITHMETIC UNIT                                   In-Out registers (10A, lOB) allow wide option in
Add time(excluAiing storage access) 42 microsec   choice of media. Program interrupt command makes
Multiply time( " " " ) 410 max to 128 min         efficient use of time between introduction of data
Divide time ( " " " ) 492 max to 480 min          words.
Construction   Vacuum-tubes
Basic pulse repetition rate 500 kilocycles/sec    OUTPUT
Arithmetic mode Parallel                          Media                      Speed
 Any arithmetic command may be repeated through   Magnetic Tape              2100 words/sec
use of "Repeat" command. Times shown are for first  Paper Tape                 60 frames/sec
operation. Repeated operations require less time.   Card                      120 cards/min
"Maximum" times shown for multiply and divide time  Cathode ray display mechanical plotter, and 150
are according to number size.                       line/min printer also available. Tape driven 600
                                                    line printer, card-tape and tape-card, Tapetyper and
                                                    Verifier available.



NUMBER OF CIRCUIT ELEMENTS                         MANUFACTURING RECORD
Tubes 4200                                         Number produced 10
Tube types 58                                      Number in current operation 10
Crystal diodes 9500                                Delivery tine 12 months

CHECKING FEATURES                                  COST
Fixed Tape units use parity check.                 Approximate price of basic system $895,000
  Complete set of autodiagostic check routines     Additiocal equipment Average $125,000
developed.                                         Rental rates of basic system $21,000 per month/
  WSPG computer has multiply overflow, divide         40 hour shift
fault, missing instruction, and illegal address.   Rental rates for additional equipment
                                                      $1,800 per nonth/4O hour shift
PHYSICAL FACTORS                                   All rentals increase 50% for each additional
Power consumption, Computer 45 K.W.                40 hour shift and include maintenance service
Space occupied, Computer 56 ft by ll ft            and parts.
Total weight, Computer 30,885 lbs
Air Cond. Internal Unit
which requires 18 gal/min of 50 F water.
All above figures include requirements of
air conditioner which is supplied as part of the
equipment.



PERSONNEL REQUIREMENTS                               ADDITIONAL FEATURES AND REMARKS
Daily Operation    Engr Tech or Oper                    Manuals on automatic coding published.
One 8-hour shift     1        2                         Library of routine.
Two 8-hour shifts    1        4                         Programming courses conducted regularly.
Three 8-hour shifts  2        6                         Constructed to JAN Specifications.
 Above figures are for average installation.            May be used in both real time and off-line
If many Printers, Converters, etc.are used,             applications without modification. Use of Rem-Rand
these figures will increase,                            metal tape makes this machine compatible with
 WSPG utilizes 2 Engineers and 2 Technicians            UNIVAC and other Rem-Rand Computers. Optional use
for maintenance only. Approximately 25                  of plastic tape units and 80 column card equipment
mathematicians and programmers are working on           makes this machine usable with other manufacturers
problem preparation.                                    equipment.
                                                        WSPG Computer will have, built-in floating-point
RELIABILITY AND OPERATING EXPERIENCE                    circuitry. The system has two input-output
Date first unit passed acceptance test Aug 1955         registers of 8 and 36 bit capacity respectively, for
Average error free running period 26 hours on           use with external equipment, with all the required
 acceptance test                                        circuits and commands.
No. of different kinds of plug-in units 26             The UNI SCI Systems differ as follows:
No. of separate cabinets(excluling power and air
  cond.) 6                                             Model            1103             1103A
Other Operators include:                               Storage      1024 CRT or MC      4096 MC
 Eglin Air Force Base                                  Mag Tape   Raytheon or Potter    Uniservos
 Operations Research Office                            Program Interrupt  No             Yes
 Ramo-Wooldridge                                       Left Transit Instruc.  No	     Yes
  Convair Aircraft Corporation WSPG Computer
accerted in August 1954.


                             WEDILOG
WEDILOG

Digital-Analog
Differential Analycer

MANUFACTURER
Wang Laboratories
Cambridge 41, Mnssachusetts

GENERAL SYSTEM                                    STORAGE                               Microsec
Application Solution of differential equations;   Media                     Words        Access
 simulation; system analysis                      Magnetic Shift Register 18 digits/unit 1000
Timing Synchronous and Asynchronous               These are unitized computation units and as many
Operation Concurrent                              as are needed may be added to the basic computer.

NUMERICAL SYSTEM                                 INPUT
Internal number system Decimal                   Computer is patched in a manner similar to the
Decimal digits per word 5                        D.C. Analog
Arithmetic System Fixed-point
Number range Minus 1.00000 to plus 1.00000       OUTPUT
                                                 Output may be typewriter, IBM equipment, plotting
ARITHMETIC UNIT                                  board, recorder.
Add time(excluding storage access )l000 nicrosec
Multiply time( ` " ") 1000 microsec              NUMBER OF CIRCUIT ELEMENTS
Divide time( " " ") 1000 microsec                Tubes 600 in basic computer
Construction Vacuum-tubes; condenser-diodes;     Tube types 5 
  Magnetics                                      Crystal diodes 200 in basic computer
Basic pulse repetition rate 1 kilocycle/sec      Magnetic elements 550 in basic computer
Arithmetic Mode Parallel



CHECKING FEATURES                                COST
Fixed                                            Approximate cost of basic system $20,000 for Model
 Alarm system and automatic stop of computation    DLS-65
indicating overflow of any integrator.           Additional equipment From $100 to $1,000 per
                                                   computation unit.
PHYSICAL FACTORS
Power consumption, Computer 2.5 K.W.             PERSONNEL REQUIREMENTS
Total weight 400 lbs                             Individual desiring solution of his problem.
 Basic computer occupies three standard relay
racks each with 65 inches of rack space.         ADDITIONAL FEATURES AND REMARKS
                                                 The Wedilog Computer is a digital differential
MANUFACTURING RECORD                              analyzer. It is patched in a manner similar to a
Number produced 1                                 D.C. Analog computer. Wedilog deals with numbers
Number in current operation 1                     and increments. All information in the machine
Delivery time 5-6 months                          is in the form of pulses and gates. Basic computer
 First unit has been built as a demonstration     may be expanded by addition of unitized computation
model.                                            units.


                             WHIRLWIND-I


WHIRLWIND-I
MIT Digital Computer

MANUFACTURER
Digital Computer Laboratory, MIT
Cambridge 51, Mass.

OPERATING AGENCY
Project Whirlwind

GENERAL SYSTEM                                         STORAGE                          Microsec
Activity of Organization WWI is sponsored by ONR      Media                Words           Access
Application Scientific and engineering computation;	Magnetic Core         2048            8 (Avg.)
  education and research at MIT.                      Magnetic Drums (2)  56,846         8500 (Avg.)
Timing Synchronous                                    Magnetic Tapes (5) 125,000
Operation Sequential                                  16 digits/stored word; 0.0046 inches/word
Most In-Out operations can be performed concurrently  on magnetic tape.
with non-In-Out operations.                     
                                                      INPUT
NUMERICAL SYSTEM                                      Media                           Speed
Internal number system Binary                         Paper Tape(Ferranti Photoelectric Tape Reader)
Binary digits per word 16                                                         200 lines/sec
Binary digits per operation 5                         Paper Tape (Mechanical) 14 lines/sec
Instructions per word 1                               Magnetic Tape 50 inches/sec
Total no. of instructions decoded 52
Total no. of instructions used 29                     OUTPUT
Arithmetic system Fixed-point                         Media                            Speed
Instruction type One-Address Code                     Magnetic Tape 188 char/sec
Number range x=0 or 1x2-15> <= |x| < 1                 Oscilloscope-Camera 200 char/sec
                                                      Direct Flexowriter 10 char/sec
ARITHMETIC UNIT                                       Magnetic tape is normally used for delayed
Add time(excluding storage access) 8 microsec         Flexowriter output.
Multiply time( " " ") 25.5 microsec
Divide time ( " " ") 57 microsec                      NUMBER OF CIRCUIT ELEMENTS
Construction Vacuum-tubes                             Tubes 7200 Envelopes 9000 cathodes
Basic pulse repetition rate 1 megacycle/sec           Tube types 40 of which 16 are used in power supply
Arithmetic Mode Parallel                              Crystal diodes 15,000
 Multiplication is performed at 2 megacycles/sec      Magnetic elements 54,816 storage cores



CHECKING FEATURES                                     PERSONNEL REQUIREMENTS
Fixed Arithmetic element checks.                      Daily operation No. of Eng. No. of Tech.
 Parity check of core and drum storage.               One 8-hour shift     2         4
 Information transfer check.                          Two 8-hour shifts    2         6
                                                      Three 8-hour shifts  2         8
PHYSICAL FACTORS
Power consumption, Computer 105 K.W.                  RELIABILITY AND OPERATING EXPERIENCE
Space occupied, Computer 4400 cu ft 625 sq ft         Date unit passed acceptance test 1950
Total weight, Computer 10 tons                        Average error free running period 15 hours
Power consumption, Air cond. 150 KVA                  Operating ratio 0.97 Good time 2582.5 Hours
Space occupied, Air. cond. 4200 cu ft 525 sq. ft.                   Attempted to run 2675 hours
Capacity, Air Cond. 120 tons                          No. of different kinds of plug-in units 17
 Additional D.C. power is furnished by tubes.         No. of separate cabinets (excluding power and
                                                        air cond.) 92 racks and 2 ERA Drums.
MANUFACTURING RECORD                                 Above figures are for a 20 week period.
Number produced 1                                    A considerable portion of equipment is not
Number in current operation 1                        packaged into plug-in units.

ADDITIONAL FEATURES AND REMARKS
	The basic WWI operation code has been
supplemented by a comprehensive system of service
routines, providing for direct read-in of Flexo-
writer-coded perforated paper tapes, the logging of
each problem on film and paper tape for subsequent
processing, assembly during read-in of a suitable
set of instructions including interpretive pro-
grammed-arithmetic (optional floating point), up to
several hundred cycle counters (B-boxes), output
routines, error detection, and automatic post mortem.
	Routines are normally coded with mnemonic operations,
symbolic addresses, relative addresses, program preset
parameters, special psuedo-codes, and special control
words.
The service routines are stored on magnetic tape
and are selected automatically during read-in.


                             WHITESAC


WHITESAC
CRC 106


MANUFACTURER
Computer Research. Corporation
National Cash Register
Dayton 9, Ohio

OPERATING AGENCY
White Sands Proving Ground
New Mexico

GENERAL SYSTEM                                      STORAGE	                             Microsec
Application Data reduction                          Media                     Words       Access
Timing Synchronous                                  Magnetic Drum (Fast)       1000        2,500
Operation Sequential                                Magnetic Drum (Slow)     10,000       25,000

NUMERICAL SYSTEM                                    INPUT
Internal number system Decimal                      Media                           Speed
Decimal digits per word 11                          Punched Card (IBM)             100/min
Decimal digits per instruction 2                    Keyboard (Flexowriter)          Manual
Instructions per word 1
Total no. of instructions decoded   20              OUTPUT
Total no. of instructions used      20              Media                           Speed
Arithmetic system Fixed-point                       Punched Card (IBM)              100/min
Instruction type Two-address code                   Typewriter (Flexowriter)         10 dig/sec
Numberrange -l< x <= l
 Excess three coding is used.	General store.        NUMBER OF CIRCUIT ELEMENTS
                                                    Tubes Approximately 900
ARITHMETIC UNIT                                     Crystal diodes Approximately 5,500
Add time	15000 microsec avg.
Multiply time 40000 microsec avg.
Divide time 40000 microsec avg.
Construction Vacuum-tubes (Flip-flop and
diode gating)
Basic pulse repetition rate 100 kilocycles/sec	
Arithmetic mode Serial



CHECKING FEATURES                                  PERSONNEL REQUIREMENTS
Fixed Unallowable instruction (command) digits     Daily Operation    Engr.   Oper or Tech.
halts machine.                                     One 8-hour shift     1           1
PHYSICAL FACTOR                                    RELIABILITY AND OPERATING EXPERIENCE
Power consumption, Computer 12 K.W.                Date unit passed acceptance test 1 March 1955
Space occupied, Computer 700 sq ft                 No. of separate cabinets(excluding power and
Capacity, Air Cond. 5 tons                          air cond.) 2
 Air Conditioner is integral part of system.
Wastewater cooled.                                 ADDITIONAL FEATURES AND REMARKS
                                                   Operations that may be performed inclule:
MANUFACTURING RECORD                                 Add             Equivalence compare
Number produced 1                                    Subtract        Transfer to storage
Number in current operation 1                        Multiply        Transfer to aux storage
                                                     Rounded divide  Punch IBM
                                                     Absolute value  Read IBM
                                                     Shift           Typewriter print
                                                     Extract         Halt
                                                     Algebraic Compare


                             WISC

WISC
Wisconsin Integrally
Synchronized Computer

MANUFACTURER
University of Wisconsin
College of Engineering
Madison 6, Wisconsin

OPERATING AGENCY
College of Engineering
University of Wisconsin

GENERAL SYSTEM                                 ARITHMETIC UNIT
Application General Purpose, scientific        Add time(including storage access) 16.7 millisec
Timing Synchronous                             Multiply time(" " ") 16.7 millisec
Operation Sequential                           Divide time ( " " ") 16.7 millisec
                                               Construction Vacuum-tubes
NUMERICAL SYSTEM                               Number of rapid access word registers 7
Internal number system Binary                  Basic pulse repetition rate 100 kilocycles/sec
Binary digits per word 50                      Arithmetic mode Serial
Binary digits per instruction 50               Operations on four instructions simultaneously
Instructions per word 1                        (integral synchronization) makes efficient use of
Total no. of instructions used 16              storage access time. Floating point makes efficient
Arithmetic system Floating-point               use of otherwise long addition time.
Instruction type Three-plus-one-address code.
Number range 40 binary digits times 2 + 255    STORAGE                                   Microsec
 Digits in instructions corresponding to sign  Media                     Words             Access
of significant digits in numbers is not used   Magnetic Drum (ERA)       1024            16,700
in any instruction. Extract instruction is     Magnetic Drum                4               550
only instruction which makes use of digits     Magnetic Drum                5               440
corresponding to exponent in numerical data.     50 binary digits/stored word


INPUT                                           PHYSICAL FACTORS
Media                        Speed              Power consumption, Computer 10 K.W.
Paper Tape (Flexowriter)  10 char/sec (Sexadec)	Space occupied, Computer 160 cu ft 52 sq ft
 Photoelectric Tape Reader is planned.
                                                MANUFACTURING RECORD
OUTPUT                                          Number produced 1
Media	                      Speed               Number in current operation 1
Paper Tape (Flexowriter) 10 char/sec 
Typewriter (Flexowriter) 10 char/sec            ADDITIONAL FEATURES AND REMARKS
Monitor Oscilloscope   Visual display of        Extract instruction and floating point controls
manually selected word.                          Remote control.
                                                Machine is financed by Wisconsin Alumni Research
NUMBER OF CIRCUIT ELEMENTS                        Foundation and University of Wisconsin, College
Tubes 1800                                        of Engineering.
Tube types 3                                    Design governed largely by striving for simplicity
Crystal diodes 550                              of operation.
  8 additional types of tubes are used in power
supply and voltage regulating circuits.


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