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IASIAS Institute for Advanced Study Computer MANUFACTURER Electronic Computer Project IAS OPERATING AGENCY Electronic Computer Project IAS Princeton University Princeton, New Jersey GENERAL SYSTEM Activity of organization Education and Research Application Mathematical Research in ballistics Aeronautics, Hydrodynamics, Elasticity, Statistics, Planning, Physics & Chemistry. Timing Asynchronous Operation Sequential All words are handled in parallel NUMERICAL SYSTEM Internal number system Binary Binary digits per word 40 Binary digits per instruction 20 Instructions per word 2 Total no. of instructions decoded 67 Total no. of instructions used 44 Arithmetic system Fixed-point Instruction type One-address Number range -1 <= x < +1 ARITHMETIC UNIT Add time(excluding storage access) 31 microsec MuJ.tiply time ( " " ") 620 microsec Divide time (" " ") 920 microsec Construction Vacuum-tubes Number of rapid access word registers 4 Basic pulse repetition rate Asynchronous Arithmetic Mode Parallel STORAGE Microsec Media Words Access Electrostatic tubes(5CPlA) 1024 25 Magnetic Drum 2048 14,000 Word size is 40 binary digits. A larger capacity magnetic drum unit is expected to be in operation in the near future. The proposed storage will be 12,288 words of 40 digits each with an access time of 17,000 microsec. INPUT Media Speed Punched Cards (IBM) 20 words/sec Twelve 40-digit words per card. OUTPUT Media Speed Punched Cards (IBM) 20 words/sec Graph -7 inch CRT 7000 points/sec Data to be graphed is stored on the drum. NUMBER OF CIRCUIT ELEMENTS Tubes Approximately 3,000 Tube types 5 Crystal diodes 5 CHECKING FEATURES Fixed Spill check on division Optional Special summation instruction forms sum (+,-,abs) of storage contents starting with address given by instruction and con- tinuing through position 1023 (last word). Two such instructions provide the sum of any selected block of the storage. This instruction is very useful in checking input-output operators. PHYSICAL FACTORS Power consumption, Computer 28 K.W. Space occupied, Computer 250 cu ft 36 sq ft Total weight, Computer Approximately 1000 lbs Capacity, Air Cond. 15 tons MANUFACTURING RECORD Number produced 7 The lAS computer was built on an experimental, non-commercial basis and was the prototype for the following: ORDVAC (Aberdeen) MANIAC (Los Alamos) ILLIAC (Illinois) JOHNNIAC (Rand) ORACLE (Oak Ridge) AVIDAC(Argonne) COST The IAS Computer was developed under Contract W-36-034-ORD-7481 with the Ar~r Ordnance Corps. The project had additional support of the ABC, ONR, and USAF. PERSONNEL REQUIREMENTS Daily Operation No. of Eng. No. of Tech. Two 8-hour shifts 1 2 The engineering staff is available when needed for machuE repair. RELIABILITY AND OPERATING EXPERIENCE Date unit passed acceptance test Early 1952 Average error free running period 4-8 hours Operating ratio 0.80 Good time 89.6 hours Attempted to run 11.2 hours No. of separate cabinets(excluding power and air cond.) 2 Above figures are based on present figures. Grand average operating ratio since Nov 1952 is 0.70 ADDITIONAL FEATURES AND REMARKS The overall organization of the computer is such that it should be able, on numerical problems, tc spend about 20% of its time on multiplication and 80% on additional operations. Thus, in one 8-hour shift it should handle a problem involving 10,000,000 multiplications.

IBM-CPCIBM-CPC International Business Machines Card Programmed Calculator MANUFACTURER International Business Machines Corporation New York, N.Y. GENERAL SYSTEM Application Business and scientific calculating. U of California Radiation Lab machine is used for scientific applications Timing Synchronous Operation Sequential Pictures furnished by IBM and Univ. of Cal. NUMERICAL SYSTEM Internal number system Binary coded decimal. Decimal digits per word 3 or 5. Total no. of instructions used 9 Arithmetic system Fixed-point Instruction type One-to two-address Number range Variable Number range depends on programming. ARITHMETIC UNIT Add time(excluding storage access) 760 microsec Multiply time(" " ") 13,180 microsec Avg Divide time (" " ") 15,480 microsec Avg Construction Vacuum -tubes Basic pulse repetition rate 50 kilocycles/sec Arithmetic Mode Parallel STORAGE Microsec Media Words Digits Access Electronic 9 17 760 Mechan (Accum) 6 80 400,000-800,000 Mechanical 48 480 400,000-1,200,000 INPUT Media Speed Card Reader 100-150 cards/min OUTPUT Media Speed Printed Record 100 or 150 lines/min Summary Punch 50 card/mm NUMBER OF CIRCUIT ELEMENTS Tubes 1500 Tube types 14 PHYSICAL FACTORS Power consumption, Computer 9.57 KVA Space occupied Accounting Machine 91.5 cu ft 25.4 sq ft Calculator 58.7 cu ft 12.2 sq ft Punch 30.3 cu ft 7.2 sq ft Each Aux Storage Unit 17.8 cu ft 5.8 sq ft Total (Including 3 storage units) 233.9 cu ft 62.2 sq ft Total Weight (Including 3 storage units) 7028 lbs. No special air conditioning required. MANUFACTURING RECORD Number produced Over 200 Number in current operation Approx 200 Number on order Not available COST Rental rates of basic system $1575/month Rental rates for additional equipment $200/month for each group of 16 words of auxiliary storage. Rental rates include engineering maintenance and parts. The rental rate for the equipment at U. of Cal. is $2670/month for the basic system and $350/month for additional equipment. The IBM engineers servicing other equipment at the Radiation Lab also service the CPC. RELIABILITY AND OPERATING EXPERIENCE No. of different kinds of plug-in units 47 No. of separate cabinets(excludlng power and air cond.) 6 (Incl 3 Aux Store) IBM reports that the average service time for all installed machines is approx 25 hours/month. U of Cal. Equipment installed November 1952. It is operated for approx one and one half shifts. Others users include Southern Bell Telephone Company Esso Standard Oil Allis-Chalmers Manufacturing Company

IBM-604IBM-604 Electronic Calculater MANUFACTURER International Business Machines Corporation New York, N.Y. GENERAL SYSTEM Application Business and scientific Timing Synchronous Operation Sequential NUMERICAL SYSTEM Internal number system Binary coded decimal Decimal digits per word 3 or 5 Tctal no. of instructions used 9 Arithmetic system Fixed-point instruction type One or two-address code Number range Variable ARITHMETIC UNIT Ad.d time(excluding storage access) 500 microsec Multiply tine( ") 14,000 microsec av. Divide tine ( ") 17,000 microsec av. Construction Vacuum tubes Bastc pulse repetition rate 50 kilocycles/sec Arithmetic mode Parallel STORAGE Micro sec Media Words Access Electronic tubes 9 500 INPUT Media Speed Card Beader-Punch 100 cards/min OUTPUT Media Speed Card Reader-Punch 100 cards/min NUMBER OF CIRCUIT ELEMENTS Tubes 1,250 Tube types 4 PHYSICAL FACTORS Power consumption Computer 7.59 KVA Space occupied, Computer 73.9 cu ft 19.4 sq ft Total weight 1949 lbs MANUFACTURING RECORD Number produced over 2500 Number in current operation over 2400 COST Rental rate of system $550 per month Rate includes customer engineering maintenance and parts. RELIABILITY AND OPERATING EXPERIENCE No. of different kinds of plug-in units 46 No. of separate cabinets(excluding power and air cond.) 2 IBM reports that the average service tine for all installed machines is approximately 10 hours/month. Users include: Hercules Powder Company, Wilmdnton, Del. Bridgeport Brass Company, Bridgeport, Conn. Chesapeake & Potomac Tel Co. Balto, Md.

IBM-607IBM-607 Electronic Calculator MANUFACTURER International Business Machines Corporation New York, N.Y. GENERAL SYSTEM Application Business and scientific calculating Timing Synchronous Operation Sequential NUMERICAL SYSTEM Internal number system Binary coded decimal Decimal digits per word 3 or 5 Total no. of instructions used 10 Arithmetic system Fixed-point Instruction type One or two-address Number range Variable STORAGE Microsec Media Words Access Electronic tubes 57 520 INPUT Media Speed Card Reader-Punch 100 cards/min OUTPUT Media Speed Card Reader-Punch 100 cards/min ARITHMETIC UNIT Add time(excluding storage access) 520 microsec Multiply time(" " ") l2,940 microsec av. Divide time (" " ") l5,700 microsec av. Basic pulse repetition rate 50 kilocycles/sec Arithmetic mode Parallel NUMBER OF CIRCUIT ELEMENTS Tubes 2584 Tube types 7 PHYSICAL FACTORS Power consumption, Computer 13.5 KVA Space occupied, Computer 178.9 cu ft 36.5 sq ft Total weight, Computer 4330 lbs MANUFACTURING RECORD Number produced over 175 Number in current operation over 175 COST Rental rate of basic system $1850/month Rental rate includes customer engineering maintenance and parts. RELIABILITY AND OPERATING EXPEPRIENCE No. of different kinds of plug-in units 63 No. of separate cabinets(excluding power and air cond.) 3 IBM reports average service time for all installed machines is approximately 10.9 hours. Users include: Shell Oil Company New York Life Insurance Company Consolidated Edison Company, N.Y.C.

IBM-608IBM-608 Transistor Calculator MANUFACTURER International Business Machines Corporation New York, N. Y. GENERAL SYSTEM Application Business and scientific computing Timing Synchronous Operation Sequential NUMERICAL SYSTEM Internal number system Binary coded decimal Decimal digits per word 9 Total no. of' instructions used 12 Arithmetic system Fixed-point Instruction type One to two-address Number range Variable dep on program ARITHMETIC UNIT Add. time(excluding storage access) 220 microsec Multiply time ( " ) 11,000 microsec Avg. Divide time ( ) 13,420 microsec Avg. Construction Transistors and. cores Basic pulse repetition rate 100 kilocycle/sec Arithmetic mode Parallel STORAGE Microsec Media Words Digits Access Magnetic Cores 40 560 220 Each word may be split into a 5 digit and 6 digit word with separate signs. INPUT Media Speed. Card Reader-Punch 155 cards/min OUTPUT Media Speed. Card Reader-Punch 155 cards/min MANUFACTURING RECORD Number produced 1 Number in current operation 1 Delivery time 12 months Engineering model stage PHYSICAL FACTORS Power consumption, Computer 2.3 KVA COST Rental rate basic system $2,250 per month. Rental rates includes customer engineering maintenance and parts.

IBM-650IBM-650 Magnetic Drum Data Processing Machine MANUFACTURER International Business Machines Corporation New York, New York Pictures furnished by Univ. of Calif'ornia RL and USN-AMTC Port Mugu, California GENERAL SYSTEM Application Commercial, Scientific and Engineering Data Processing Timing Synchronous Operation Sequential and partially concurrent INTERNAL SYSTEM Internal number system Decimal Decimal digits per word. 10 plus sign. Decimal digits per instruction 10 plus sign. Instructions per word 2 Total no. of instructions decoded 89 Total no. of instructions used 89 Arithmetic system Fixed-point Instruction type Two-address code Number range -10^{10}<= n <= 10^{10}ARITHMETIC UNIT Add time(excluding storage access) 672-768 microsec Multiply time( " ) 2,2l0-l9,600 microsec Divide time( ) 6,000-23,400 niicrosec Construction Vacuum-tubes and Diodes Number of rapid access word. registers 3 Basic pulse repetition rate 125 kilocycles/sec Arithmetic Parallel by bits serial by digit. 60 words of magnetic core storage, individually addressable. Multiply and divide time depends on sum of digits of multiplier and quotient respectively. mm 4,800 STORAGE Microsec Media Words Access Magnetic Drum 1,000 or 2,000 96 Magnetic Core 60 96 Magnetic Tape 500,000 per unit. Maximum of 6 Tape Units possible. Time to accelerate tape to read or write status (75 inches per second) from standstill is 10 mil sec of which 9.7 mil sec is available for further computation. Magnetic tape is compatible with Electronic Data Processing Systems 701, 702, 704, and 705. Magnetic Tape Unit can rewind. 2400 feet of tape in 1.2 minutes. INPUT Media Punched. Card. Reader 200 cards per/min-150 cards per/mm from read feed of Type 407 Accounting Machine when attached. A 10 word. input buffer is provided which allows computation to proceed. for 172 millisec. of the 300 millisec. necessary to read a card. Magnetic Tape 15000 characters per second A 60 word. magnetic core buffer is available between the magnetic tape and the magnetic drum. Each of these words of core is addressable and can be used for rapid access storage when not reading or writing magnetic tape (96 microsec. per word access). Tape from 702,704, or 705 can be read. by this tape unit. Rewind. time for 2400 feet of tape is 1.2 minutes. OUTPUT Media Speed Punched. Card. Recorder 100 cards per/mm A 10 word output buf'fer is provided. which allows computation to procede for 565 mil sec of the 600 mil sec necessary to punch a card. Magnetic Tape 15000 characters per/sec A 60 word magnetic core buffer is available between the magnetic tape and the magnetic drum. Each of these words is addressable and can be used for rapid access storage when not reading or writing magnetic tape (96 microsec. per word access) Rewind time for 2400 feet of tape is 1.2 minutes Tape can be read by 702, 704, or 705. Line Printer (wheel type) 150 lines per minute with 120 characters per line. Printer connected. directly to Main Frame of Computer tbrougb 10 word print buffer. Line Printer (Wire matrix type) 1000 lines per minute 60 characters per line. Printer connected to magnetic tape frame, inde- pendent of computer. NUMBER OF CIRCUIT ELEMENTS Tubes 2,000 Tube types 7 Crystal diodes 4,000 - 5,280 Tube types are 5965, 6350 5687, 6211, 12AY7, 2D21 and. 6A145. 1,000 word. drum has 119 heads. 2,000 word drum has 219 heads. CHECKING FEATURES Validity character check. This check is placed on data and instructions in arithmetic and logical units every 96 microsec. (every word time). The check accomplishes: dropped and picked up bits are immediate1y detected. only 10 admissible combinations out of 128 possible combinations. The register in question is indicated on console. Non-existant addresses and order codes are detected as errors. Clocking checking circuits are provided for magnetic drum. Card feed errors are indicated A double punch or a blank column in any colu~i which ha received a punch instruction for the output cards causes an error indication light to switch on and the operation will stop. Overflow of accumulator Divide check Dividend >= divisor Horizontal and vertical parity checks on magnetic tape. Magnetic tape to card check. MANUFACTURING RECORD Number produced 120 Number in current operation 120 Number on order 750 Delivery time 12-18 months COST Basic system consisting of: Power supply Card. Reader and Punch Input-output Punch Card Buffer 1,000 words of storage $3,250/mo Same as above but with 2,000 words of storage $3,750/mo Alditional Features: Alphabetic Device Magnetic tape (maximum of 6) Magnetic tape control unit Line Printer (wheel type) 150 lines per mm with 120 characters per line. 60 words of magnetic core storage (access 96 microsec any word) Line Printer (wire matrix type) 1000 lines per minute with 60 characters per line. Automatic Floating point Index Registers Rental include Customer Engineering maintenance and parts supplied by IBM. PERSONNEL REQUIREMENTS Daily operations No. of Engineers No. Tech.Operators 1-8 hour shift maintained by IBM 3 mathematicians 2 machine operators 2-8 hour shifts maintained by IBM 6 mathematicians 4 machine operators 3-8 hour shifts maintained by IBM 9 mathematicians 6 machine operators ADDITIONAL FEATURES AND REMARKS A program is available which will automatically optimum program any existing program. Magnetic tape is compatible with 701, 702, 704 and 705. Index Registers: 3 four digit plus sign registers are available for the Type 650. Each register is uniquely addressable from the logical element. Floating Point hardware is available for the Type 650. The system is based upon 8 significant digits of data and a 2 digit exponent.

IBM-701IBM-701 Electronic Data Processing Machine MANUFACTURER International Business Machines Corporation New York, New York Pictures supplied by General Motors, Lockheed. Aircraft and University of' California RI. GENERAL SYSTEM Application Commercial, Scientific and Engineering Data Processing Timing Synchronous Operation Sequential and partially concurrent NUMERICAL SYSTEM Internal number system Binary Binary digits per word 18 or 36 per data word Binary digits per instruction 18 Instructions per word. 2 Total no. of instructions decoded 32 Total no. of instructions used 32 Arithmetic system Fixed-point Instruction type One-address Number range -(2^{35}-1) <= n <= (2^{35}-1) Each half or whole data word is uniquely addressable. Floating point sub-routine with 3-address logic and three logical index registers. ARITHMETIC UNIT Add time(excluding storage access) CRT 60 microsec; Mag core 36 microsec Multiply time(excluding storage access) 444 microsec Divide time(exclud.ing storage access) 444 microsec Construction Vacuum-tubes or Magnetic cores Basic pulse repetition rate 1 megacycle Arithmetic mode Parallel Above times includes access to instruction. STORAGE Media Words Magnetic Core 4096 12 microsec access. Cathode Ray Tube 2048 or 4096 12 microsec access. Magnetic Drum 8192 or 16,364 50,000 average to first word of group. Computation time is available depending on pro- granming technique. Subsequent word time is 1,280 per word of which 1,000 can be used for computation. Magnetic Tape 300,000 binary words Type 726. 2 per tape. (Up to 4 Magnetic tapes per frame. magnetic tapes) Pulse packing 100 groups per inch. The time to accelerate magnetic tape to write status (75 inches per sec.) is 10,000 of which 6,000 is available for further computations. Time to write subsequent words is 792 each, of which 700 is available for further computation. Time to accelerate magnetic Tape to read status (75 inches per second) from standstill is 10,000 of which 4,000 can be used for further computation. Time to read subsequent words is 792 of which 540 is available for computation. Magnetic tape 900,000 binary words per 1 Magnetic tape per tape. 540,000 binary frame. Pulse packing coded decimal & alpha- 200 groups per inch. numeric words per tape. Up to 10 tapes Time to accelerate magnetic tape to write status (75 inches/sec) from standstill is 10,000 of which 7,000 are available for further computation. Time to write subsequent words is 400 each of which 336 is available for further computation. Time to accelerate magnetic tape to read. status (75 inches/sec) from standstill is 10,000 of which 3,000 are available for further computation. Time to read subsequent words is 400 each of which 288 are available for computation. Magnetic tape unit cam rewind 2400 ft of tape in 1.2 minutes. Either magnetic core or cathode ray tube storage is used. Time is in microsec. INPUT Media Speed Punched Card Reader 150 cards per/mm 177 millisec are available between cards for computation. Magnetic Tape 12,500 dec dig per/sec Type 726 Magnetic Tape If magnetic tape is alpha- Type 727 numeric: 15,000 char/sec. If magnetic tape is pure bin: 25,000 dec digits/sec. Card to Magnetic 250 cards per minute. Cards Tape (for Type 727 must be in decimal alphanumeric only) code. Tape is written in bin. coded decimal alphanumeric code and simultaneously checked. OUTPUT Media Speed Punched Card Recorder 100 cards per/mn Binary: maximum of 24 words per card. 342 millisec computing time is available while punching one card. Decimal: 342 millisec computing time is available while punching one card. Line Printer 150 lines per/min (wheel type) 72 characters per line Printer is connected. to the computer through the analytical and logical unit. Available for computation between successive lines: 322 millisec. Cathode Ray 8300 data points per/sec Tube Display The unit consists of two display tubes: A 7 inch tube for photographic purposes; and, A 21 inch tube for visual displays. Magnetic Tape 12,500 equivalent dec digits Type 726 per sec. Magnetic Tape Type 727 Magnetic Tape to 100 cards per mm. Alpha- Card(Type 727 only) numeric punched characters are automatically internally checked by unit. Magnetic Tape to Line (1) 150 lines per mm (wheel Printer(Type 727 only)printer) (2) 120 alphanumeric characters per line. 1000 lines per mm at 60 chars per line (wire matrix printer) NUMBER OF CIRCUIT ELEMENTS Tubes 4000 Tube types 35 Crystal diodes 12,800 CHECKING FEATURES Magnetic Tape (Type 726) Vertical parity bit check for each tape column. Magnetic Tape (Type 727) Hoizzontal and. vertical parity bit check for each tape row and. column. Line Printer Echo checking for each printed. character. Card to Magnetic Tape Checks magnetic tape as Type 726. Checks card.. Tape to Printer (Type 727 magnetic tape only) Horizontal and vertical parity bit check for each tape row and. column. Echo checking for each printed. character. Tape to card. Horizontal and vertical parity bit check for each tape row and column. Arithmetic and. Logical Unit Overflow in accumulator. Two extra positions are on left side of accumulator so that overflow is not lost. Divide check. |Dividend| <= |Divisor| PHYSICAL FACTORS Weight(lbs) KVA Main Frame 2850 37.4 Punched. Card. Recorder 720 0.7 Line Printer(T~heel Type) 2795 3.1 Magnetic Drum 1480 9.9 Cathode Ray Tube Frame 2445 11.8 Power Frame No. 1 2810 5.8 Power Frame No. 2 2750 5.8 Power Distribution Unit 1230 1.2 Magnetic Tape Unit (726) 1270 4.6 Magnetic Tape Control Unit1636 6.0 Punched. Card. Reader 530 0.7 Space occupied. Machine including two 726 frames. 3000 sq ft Customer engineering requirements 400 sq ft Air Conditioning 40 tons US-NOTS Inyokern This installation reports a power consumption of 80 K.W. (88 KVA). The total weight is 20,070 lbs and. occupies 611 cu ft and 1200 sq ft. The air conditioning blower motor operates 24 hours at 89.4 KVA. An A.C. motor operates 18 hour utilizing 403.0 K.W. This is a central plant con- densing unit located in basement. Plenem chamber including filters, heating and cooling coils. Blower and motor located on roof. No floor space required. Air is distributed through ceiling ducts. > MANUFACTURING RECORD Number produced. 19 Number in current operation 19 Number on order 0 COST System I. Monthly Charges Electronic Analytical Control Unit $8100 Electrostatic Storage Unit (2048 words) 2600 Punched Card Reader 200 Alphabetic Printer (wheel type) 800 Punched Card Recorder 200 2 Type 726 Magnetic Tape Readers & Recorders (2 magnetic tapes per frame) for a total of 4 magnetic tapes) 1700 Magnetic Drum Reader and Recorder 1400 Tape Control Unit 2500 System II. Electronic Analytical Control Unit $8100 Electrostatic Storage Unit (2048) words 2600 Punched. Card Reader 200 Alphabetic Printer (wheel type) 800 Punched. Card Recorder 200 4 Type 727 Magnetic Tapes (one magnetic tape per frame) 2200 Magnetic Drum Reader and. Recorder 1400 Tape Control Unit 2500 This system is compatible through common language tape units with the 650, 702, 704, 705 and the additional equipment listed below. Either of the above systems may replace the 2048 words of cathode ray tube storage with 4096 words of magnetic core storage. Tape To Card. Punch and. Card Punch Control $1050 Unit (punches 100 cards/minute) Magnetic Tape to Line Printer (wheel type) and Printer Control Unit 1800 Magnetic Tape to Card Reader and Card. 2400 Reader Control Unit (reads 250 cards/minute) Cathode Ray Tube Output Recorder 2850 PERSONNEL REQUIREMENTS No. of Engineers No. of Prograimoers 1 8-hour shift Maintained. by IBM 15-25 IBM This figure can vary greatly depending upon the amount and type of work the installation does. For example, if' the machine is required to solve routine problems day in and day out with a small to medium amount of new work being processed, the number of programmers will be fairl' close to 15. If' few problems are ever solved more than once and the problems are not similar in nature, then the number of' programmers will approach 25. United Aircraft Total personnel is 80 including 10 IBM; consisting of 35 progranmers and 35 operators for one IBM 701 and six IBM CPC1s. AEC-UCRL Livermore 9 IBM and. 5 Operator personnel for 24 hour operation; the 4th shift is composed of' Saturday and Sunday, the engineers are furnished by IBM and operators run pro- duction problems during extra shifts. General Motors Corporation 23 Engineers and. 1 Technician or Operator for 1 1/2 shifts of operation and some on Saturday. Much of the work requires mathematical formulation, numerical analysis, and is of a short one-shot nature. Lockheed Aircraft 2 IBM Engineers each shift, 3, 4, and. 6 operators respectively on each shift; One or two machines are run on swing shift and two machines on graveyard. One or two machines are run on Saturday and two all day Sunday (24 hours). One experienced. man works from 8 p.m. to 7 a.n. Monday through Friday and 7 p.m. to 7 a.m. on Saturday and. Sunday. One man assists him on swing shift and. two on graveyard. This is a most unsatisfactory arrangement; attempts are being made to eliminate Saturday and. Sunday night-work. US-NOTS Inyokern 4 Engineers and. 15 technicians or operators are required for two 8 hour shifts. Associated. with the machine are 10 mathematicians and. 5 mathematical aides. 10 - 15 individuals outside the computing organization program and run their own problems. RELIABILITY AND OPERATING EXPERIENCE One IBM six month operating report based on sixteen 701's, establiaked the following reliability: 37,385.2 Hours machines turned on 5,015.7 Preventive maintenance hours 2,009.3 Hours for engineering changes and emergency repairs 30,360.2 Hours available to customers 81.2 Percent Usable Hours United. Aircraft Corporation System accepted. 5 October 1953; the average error- free running period. is 2 hours; the computer is available 82% of the time, is operated on a 3 shift, 6 day week. AEC-UCRI Livermore System accepted 26 April 1954; the average error- free running period is 6.2 hours; good time is 3032 hours and. the attempted to rim time is 3587 hours, resulting in an operating ratio of 0.85; the average error free running time is calculated by dividing the total hours less the total Scheduled I'~intenance less Total unscheduled Maintenance less the Loss Time Claimed by Operator all by the Total number of Hours of Down and. Lost Time reported.. The above figures are given for the period Jan 55 to June 55 when operating 24 hours/day. General Motors Corporation System accepted in April 1954; average error free running period. is 4.5 hours derived. from the records for 1 month; good time of 1067 hours and attempted to run time of 1154 hours yielding an operating ratio of 0.92 for a four month period. Lockheed Aircraft Corporation Systems accepted on 14 May 53 and 15 July 54; average error free running periods of 3-4 hours on one and 1 1/2 hours on the other; good time of 74.4% and. 80% where good time is considered as actual production and the remaining 25.6% and 20% respectively, consists of preventive maintenance, breakdown, machine re-work and idle time. The average error-free running period is reduced considerably when tapes are used frequently. Short runs are made wherever possible (1-5 hours), but the same program is run for as long as 12 hours and would. run longer if time permitted. US-NOTS Inyokern Computer passed acceptance test on 8 October 1953 as the 8th machine of a series of 18 in the U.S. Good time obtained is 85% out of 100% attempted to run including preventive maintenance. Approximtely 230 different kinds of plug-in units are used in the system. ADDITIONAL FEATURES AND REMARKS IBM Type 727 Magnetic Tape is compatible for the IBM 650, 701, 702 and 705 systems. IBM provides assistance from the 701 school in New York, the Applied Science Representative and Special Representatives of specific industries. Subroutines are available for many applications, including floating decimal point operation. United Aircraft Corporation Uses Speedco interpretive routine. AEC UCEL Livermore Line Printer is used for inmiediate results, storage is large and fast and system is simple to operate. General Motors Corporation Two interpretive systems are used, Speed Co and ACOM. Speed Co 3-address while AC0M is 2-address. Both provide for floating point arithmetic, transcendental functions, In-Out operations, B-boxes, and tracing all of which aid in coding and checkout. Lockheed Aircraft A general purpose system called FLOP, a contraction of Floating Octal Point, was developed at Lockheed by members of the Digital Computing Staff. Flop converts the 701 into an entirely different machine, one which performs all its operations in a "floating octal" system, but also permits all the n normal 701 operations to be executed in fixed binary. The floating octal operations performed by the system are add, subtract, multiply, divide (all with real or complex numbers), log_{8}x, 8^{x}, sin x, sin^{-l}x, and square root. The system also provides certain logical operations and control of the input-output devices in three number systems: binary, octal and floating decimal. This system was developed in order to obtain a minimum of elapsed tine from when a new problem first enters the department to when answers are obtainable.

IBM-702IBM-702 Type 702 Elecoronic Data Processing Machine MANUFACTURER International Business Machines Corporation New York, N.Y. GENERAL SYSTEM Application Commercial and Scientific Timing Synchronous for Central Processing Unit and Asynchronous for In-Out. Operation Sequential - Concurrent. NUMERICAL SYSTEM Internal number system Binary coded decimal and alphabetic Total no. of instructions decoded 52 Total no. of instructions used 52 Arithmetic system Fixed-point Instruction type One-address Code Number range Variable The 702 is not a fixed word length system. It is possible to have both variable field and variable record lengths. Consequently there are no words. The characters are alpha/numeric. Five characters are required to make up an instruction. 25 microsec ARITHMETIC UNIT Add time(excluding storage access) 25 microsec Multiply tme (" " ") 23 [N_{p}(N_{c}+ 4) + 1] + 115 microsec Divide time(excluding storage access) 25 [10 + N_{d}+ (N_{d}- N_{r})(7.5K + 15)] + 115 microsec Construction Vacuum-tubes Number of rapid access word registers 2 (256 positions each) Basic pulse repetition rate 1 megacycle/sec Arithmetic Mode Serial N_{p}is number of multiplier digits N_{c}is number of multiplicand digits N_{d}is number of dividend digits N_{r}is number of divisor digits K = N_{r}if N_{r}>8 K = N_{r}+ .005(8-N_{r}) if N_{r}< 8 STORAGE Alphanumeric Microsec Media Characters Access Electrostatic 10,000 25 Magnetic Drum 60,000 8120 + 40N Magnetic Tape 5,760,000 lO140 + 67h Magnetic Drum has 500 sections 200 char = 60,000 char. "N" represents number of characters. INPUT Media Speed Magnetic Tape 75 inches/sec 15,000 char/sec Punched Card 250 cards/min OUTPUT Media Speed Magnetic Tape 75 inches/sec 15,000 char/sec Punched Card 100 cards/min Typewriter 600 char/min Printer 500 lines/min 120 print position 150 lines/min 120 print position 1000 lines/min 60 print position 1000 lines/min 120 print position NUMBER OF CIRCUIT ELEMENTS Tubes 10,000 Tube types 10 Crystal diodes 17,000 CHECKING FEATURES Instruction During instruction time, a character code error is detected. An invalid operation part is encountered going to the operation register. The operation part is incorrectly interpreted. The highest order position of the instruction address carries any zone other than 00 zone or the minus (10) zone to designate accumulator B. Any of the remaining positions of the addresses are other than the numerical 0 through 9. Machine The machine check indicator is turned on when a character code error is detected during the execution of all instructions (except write, write and erase, read, and read check) in which information is read from accumulator storage or memory. Bead-Write Checks the transmission of data from all input units to memory. It also checks the transmission of all output data from memory to the drum, tape unit, card punch record storage, printer record storage, and typewriter. Printer-Punch This indicator reflects any error when information is punched in a card or when printed on the printer. Overflow The overflow check indicator is turned on during an add or subtract operation when the number of digits in the result is greater than the number of digits in the longer of the original fields. An overflow is indicate as a result of a round operation if a carryover is made out of the highest order position of the original accumulator storage field. Sign The indicator turns on when a field addressed by an arithmetic instruction does not have plus or minus zoning over the right hand digit. PHYSICAL FACTORS Power Current Heat Weight Size (nearest inch) Type Name Qty. K.W. Amps B.T.U. lbs. Width Length Height 702 Central Processing Unit 1 25.0 87 85,000 5,291 147 139 63 Main Power Unit 1 2,961 54 61 66 Console 1 508 55 61 46 712 Card Reader 1 5.0 17 17,000 1,055 45 28 49 756 Card Reader Control Unit 1 1,712 27 57 64 717 Printer 1 9.0 51 50,700 2,244 50 64 47 757 Printer Control Unit 1 1,866 27 57 64 722 Card Punch 1 7.6 26 26,000 1,176 25 55 50 758 Card Punch Control Unit 1 1,866 27 57 64 752 Drum Unit 1 6.9 24 25,600 1,775 27 62 64 Drum Power Supply 1 1,646 27 40 64 727 Tape Unit 10 13.0 45 44,200 9,110 27 24 64 752 Tape Control Unit 1 8.4 29 28,700 1,656 27 57 64 Total ----- --- ------ ----- 74.0 259 255,200 52,844 Approximately one ton of airconditioning required for 12,000 B.T.U. MANUFACTURING RECORD Number produced l4 Number in current operation 11 as of 1 Sept. 1955 Number on order 3 Delivery time Out of production COST Rental Rates of System Components Monthly Type Speed Charge 702 Central Processing Unit $8,650 712-756 Card Reader and Card Reader Control Unit 1,050 717-757 Printer and Printer Control Unit 1,800 722-758 Card Punch and Card Punch Control Unit 1,050 727 Magnetic Tape Unit 550 752 Tape Control Unit 550 732 Magnetic Drum Storage Unit 2,800 719 Printer, 1000 lines per minute 60 1,400 printing positions 730 Printer, 1000 lines per minute 120 2,100 printing positions 760 Storage Unit for Printers and Tapes 1,850 There is no predetermined grouping of equipment. Any combination of above is available depending on customers needs. PERSONNEL REQUIREMENTS No. of Tech. Daily 0peration No. of Eng. or Operators 1-8 bnur shift 4 1 console operator 2-8 hour shifts 7 and 2 floor oper- 3-8 hour shifts 10 ators on each shift Programmers vary from 4 to over 50 depending on number of applications on system. RELIABILITY AND OPERATING EXPERIENCE Date first unit passed acceptance test 1 Feb 55 Operators are Monsanto Chemical Co. St. Louis, Mo. General Electric - A.E.C. Richland, Washington Commonwealth Edison Company Chicago, Illinois ADDITIONAL FEATURES AND REMARKS Inter-tape- card-printer conversion Rental rates include servicing Educational assistance through 702 School Special Representatives Programming Service System being replaced by IBM 705 Autocoder System is used.

IBM-704IBM-704 Electronic Data Processing Machine MANUFACTURER International Business Machines Corporation New York, New York OPERATING AGENCY University of California Radiation Laboratory Livermore, California GENERAL SYSTEM Application UCEL Scientific Computing IBM Commercial, Scientific and Engineering Data Processing. Timing Synchronous Operation Sequential and partially concurrent. NUMERICAL SYSTEM Internal number system Binary Binary digits per word 56 Binary digits per instruction 56 Binary digits per instruction not decoded 6 Instructions per word 1 decrement field. Total no. of instructions decoded 86 Total no. of instructions used 86 Arithmetic system Floating-point, fixed-point, and logical arithmetic. Instruction type One-address Number range Fixed-point -(2^{35}) -1) < n < (2^{35}) -1) Floating-Point -10^{38}< n < 10^{38}Sign is provided for floating-point exponent. ARITHMETIC UNIT Add time(excluding storage access) FixP 12 FloP 72 mic Multiply time (" " " ) FixP 228 FloP 192 mic Divide time(" " " ) FixP228 FloP 204 mic Construction Vacuum-tubes, transistors and Magnetic cores. Nmnber of rapid access word registers 3 index 2 Arithmetic Basic pulse repetition rate 1 megacycle/sec Arithmetic Mode Parallel Add and Multiply time includes access to instruction. FloP divide time is 24 microsec if dividend fraction is 0. STORAGE Microsec Media/Words Access Magnetic Core 12 to any word (10 dec digits 8192 equivalent and sign) Magnetic Drum 12,000 avg. access to first word, 8192 or 16,384 96 per word for subsequent words. Of the 96 per word, 56 are avail- able for further computation. Magnetic Tape Time to accelerate magnetic tape 900,000 bin to write statue (75 inches per sec.) words per tape from standstill is 10,000 of which 540,000 bin 7000 are available for further compu- coded dec and tation. alphanumeric Time to write subsequent words is 400 words per tape. each, of which 536 is available for Up to 10 tapes. further computation. Time to accelerate magnetic tape to read status (75 inches/sec.) from standstill is 10,000 of which 3,000 are available for further computation. Time to read subsequent words is 400 each, of which 288 are available for computation. Magnetic tape unit can rewind 2400 feet of tape in 1.2 minutes. Provision has been made in addressing and indexing system to increase main frame storage up to 32,768 words of magnetic core when made available by IBM. INPUT OUTPUT Media Speed Media Speed Punched Card Reader 150 or 250 cards per minute. Punched Card Recorder 100 cards/min Cards are 80 column. 24 words/card (bin) Magnetic Tape a. If magnetic tape is 542 millisec comp time alphanumeric; 15,000 char/sec. avail/card (bin and dec) b. If magnetic tape is pure Line Printer (Wheel 150 lines/min, 72 char line. binary; 25,000 decimal equiva- type) 522 millisec comp time lent digits per sec. avail/card c. Calculation times apply Cathode Ray Tube 8,500 Data points/sec as in magaetic tape storage. display 7 in tube for photos Card to Magnetic 250-80-column cards per min. 21 in tube for visual Tape. (Independent a. Cards must be in decimal Magnetic Tape If magnetic tape is to be operation) alphanumeric code. Tape is written in alphanumeric or written in binary coded decimal binary coded decimal code: alphanumeric code and simultane- 15,000 char/sec. ously checked. If magnetic tape is to be 290 or 177 millisec are available between cards for written in bin dig: 25,000 computation. dec equivalent digits sec. Time to convert worst case of decimal to binary Magnetic Tape to 100 cards/min punched (floating-point word) and check conversion is 7 80 Col Card characters are automatically millisec. per word. Therefore all conversion in one internally checked by unit. 80 column card can take place between the cards. Magnetic Tape to 150 lines/mm (wheel printer) Printer Line 120 alphanumeric char/line. 1,000 lines/mm at 60 char/line (wire matrix printer) CHECKING FEATURES COST Fixed Rental Rates for Basic System Rent/Ma. Magnetic Tape Central Processing Unit $13,000 Horizontal and Vertical parity bit check for each Punched Card Reader 200 tape row and column. Line Printer (Alphanumeric) 800 Line Printer. Punched Card Reader 200 Echo checking for each printed character. Four Magnetic Tape Units 2,200 Card to Magnetic Tape. Magnetic Tape Control Unit 2,500 Checks magnetic tape as above. Magnetic Drum Reader and Recorder 2,700 Checks card. Magnetic Core Storage Unit 6,100 Tape to Printer. Cathode Ray Tube Output Recorder 2,850 Checks magnetic tape as above. Total 30,550 Echo checking for each printed character. Rental rates for additional equipment. Tape to Card. Sameas above. Magnetic tape to Card(Card Punch and Cntrl) $1,050 Magnetic Tape to Printer(Printer and Cntrl) $1,800 Punched card is checked. Card to Magnetic Tape, (Card Reader and Cntrl)2,400 Arithmetic and Logical Unit. Card Punch 100 cards/min Overflow in accumulator. Two extra positions are on Card Reader 250 cards/mm left side of accumulator so that overflow is not lost. Service included Divide check if |Dividend| >= |Divisor| AEC-UC RL Livermore reports a total rental rate of Machine can operate in trapping node Sor checking flow $33,800 per shift per month for basic system of the problem to assist in program checking. and $8,100 per shift per month for additional equipment. PHYSICAL FACTORS Weight(lbs) KVA Main Frame 2,850 40.3 Punch Card Recorder 530 .7 RELIABILITY AND OPERATING EXPERIENCE Line Printer(wheel type) 2,795 3.1 AEC-UCRL Livermore, Calif IBM 704 is to be delivered Magnetic Drum 1,480 10.4 Dec. 1955. Magnetic Core Frame 2,425 6.4 ADDITIONAL FEATURES AND REMARKS Cathode Ray Tube Display Unit 2.4 Fortran (automatic formula translation), a program for Power Frame No. 1 2,810 5.8 automatically translating mathematical notation to Power Frame No. 2 2,810 5.8 optimum machine programs. Power distribution Unit 1,230 1.2 Three indexing registers for automatic, address Magnetic Tape Unit 900 2.5 modification and cycle counting (independent of Magnetic Tape Control Unitl,636 6.0 arithmetic element). Power Factor: .65 < Cos T < .7 Logical operations based on the full 36 bits per word. Automatic feature for setting up RETURN address for Space occupied: closed subroutines. Machine including 10 tape units 3,000 ft^{2}Magnetic tape compatibility for the IBM 650, 701, 702 Customer Engineering Requirements 400 ft^{2}and 705 machines. Air conditioning, Overall, Approx.40 tons. Automatic Floating-or Fixed-Point operation built into hardware. MANUFACTURING RECORD IBM provides technical assistance through the 704 school Number produced 1 in New York, Number in current operation 1 Applied Science Representations, and special representatives Number on order 35 of specific industries to assist in problems relative to their Delivery time Approximately 18 months, industry. These services are included in the previously quoted rentals.

IBM-705IBM-705 Electronic Data Processing Machine Type 705 MANUFACTURER International Business Machines Corporation New York, N.Y. GENERAL SYSTEM ARITHMETIC UNIT Application Commercial; may be used for scientific Add time(excluding storage access) 17 microsec/dig Timing Synchronous for Central Processing Unit Construction Vacuum-tubes and Cores Asynchronous for Input-Output devices Number of rapid access word registers 15 storage Operation Sequential for internal data handling in Registers, including 14 at 16 positions the Central Processing Unit and Concurrent using 1 at 32 positions the Tape Record Coordinator or when doing simul- 1 at 256 positions taneous Read while Write without the use of the Basic pulse repetition rate One megacycles/sec Tape Record Coordinator. Arithmetic Mode Serial Multiply time, NUMERICAL SYSTEM 17 [N_{p}(N_{c}+ 4] + 2] Microsec Internal number system Binary coded dec and alpha- N_{p}is number of digits in multiplier (accumulator 00) betic Total no. of instructions decoded 35 N_{c}is number of digits in multiplicand storage Total no. of instructions used 35 Divide time, Arithmetic system Fixed-point Instruction type One address code 17 [11 + N_{d}+ (N_{d}- N_{r})(7.5 N_{r}+ 15)] Number range Variable microsec The 705 is not a fixed word length system. It is N_{d}is number of digits in dividend possible to have both variable field and variable N_{r}is number of digits in divisor digits in dividend record lengths. Consequently there are no words. The characters are alpha/numeric. Five characters are required to make up an instruction. Each char of a record is individually addressable. STORAGE Microsec CHECKING FEATURES Media Char Access Fixed Magnetic Core 20,000 alphanumeric 17 Instruction: verifies the character code and also Magnetic Drum 6O~Ooo alphanumeric (8,000-40 N)/char checks the correct interpretation of the operation. Magnetic Tape 5,760,000 alphanumeric l0,000-67N/char Machine: checks the character coding of instructions N above is number of characters. when data are transferred from accumulator or auxiliary On the magnetic Drum there are 500 sections at storage or memory. 200 char/section Read - Write: Checks the transmission of data from all input units to memory. It also checks the transmissior INPUT of all output data from nemory to the drum tape unit, Media Speed card punch record storage, printer record storage, Magnetic Tape 75 inches/sec and typewriter. Punched Card 250 cards/min. Record: This indicator reflects any error when infor- mation is punched in a card or when printed on the OUTPUT printer. Media Speed Overflow: The overflow check indicator is turned on Punched Card 100 cards/min during an add or subtract operation when the number of Magnetic Tape 75 inches/sec 15,000 char/sec digits in the result is greater than the number of Printer 150 lines/min 120 print positions digits in the longer of the two fields. An overflow 1,000 lines/nm, 60 or 120 print positions. 500 is indicated as a result of a round operation, if a lines/nm, 120 print positions. 600 char/min carry-over is made out of the high-order position of the accumulator storage field. The indicator is turned on by a divide instruction Tubes 1700 in CPU; 4400 peripheral when the divisor does not have a greater absolute value Tube types 10 than an equal number cf digits taken from the left end Crystal diodes 4600 in CPU; 8500 in peripheral of the dividend. Magnetic elements 155,000 When the error switch for this indicator is turned to AUTOMATIC, an error stops the machine during the execution of the instruction. Sign: The indicator turns on when a field addressed by an arithmetic instruction does not have plus or minus zoning over the right hand digit. PHYSICAL FACTORS Type B. T. U. Weight Size (Nearest Inch) No. Name Qty. K.W. (lbs.) Width Length Height 705 Central Processing Unit 1 25.0 85,525 5,291 147 139 63 Main Power Unit 1 2,961 54 61 66 Console 1 508 55 61 46 714 Card Reader 1 4.75 16,520 1,055 45 28 49 759 Card Reader Control Unit 1 1,712 27 57 64 717 Printer 1 7.46 25,500 2,244 50 64 47 757 Printer Control Unit 1 1,866 27 57 64 722 Card Punch 1 5.76 19,660 1,176 25 55 50 758 Card Punch Control Unit 1 1,866 27 57 64 754 Drum Unit 1 6.9 25,580 1,775 27 62 64 Drum Power Supply 1 1,646 27 40 64 727 Tape Unit 10 11.3 38,640 9,110 26 24 66 754 Tape Control Unit 1 8.4 28,570 1,656 27 57 64 ----- ------ ----- Total 69.57 237,615 52,844 Approximately one ton of air conditioning required for 12,000 B. T. U. MANUFACTURING RECORD PERSONNEL REQUIREMENTS Number produced 1 Engineering prototype Daily Operation Engr Tech or Oper. Number on order Over 100 1 8-hour shift: 4 1 console operator Delivery time 24 months 2 8-hour shifts: 7 & 2 floor operators on each shift. COST RENTAL BASIS ONLY Programmers vary from 4 to over 50, depending Type Name on number of applications on system. 705 Central Processing Unit -- With Core $14,000 Memory ADDITIONAL FEATURES AND REMARKS 714-759 Card Reader and Card Reader Control The following assistance is available: Unit 2,400 Special Representatives-- This group offers over- 717-757 Printer and Printer Control Unit 1,800 all consulting service in connection with the study 722-758 Card Punch and Card Punch Control Unit 1,050 of possible uses. 727 Magnetic Tape Unit 550 Educational Program - - One-week classes conducted 754 Tape Control Unit 2,000 for executives at LEM educational departments in 754 Magnetmc Drum storage Unit 2,800 Endicott and Poughkeepsie, New York. Comparable 760 Storage Unit for Printers and Tapes 1,850 classes are available in several major cities across 719 Printer, 1000 lines per/min 60 1,400 the country. These courses are designed to acquaint printing positions executives with the organization, operating charac- 750 Printer, 1000 lines per/min 120 2,100 teristics, capacities, and applications of the 705. printing positions Customers who complete this course are better able to 777 Tape Record Coordinator 5,000 evaluate the advantages, economies and wide busiress Rental rates include customer engineering maintenance applications of the 705 parts. In addition to the executive class, courses are There is no predetermined grouping of equipment. available to qualified methods personnel. These Combinations are based on customers needs classes are of longer duration and provide knowledge of programming and necessary operating details. Programming Service - Personnel are available for consultation with field representatives and customers. A library of programs comeon to many problems is avail able for adoption as sub-routines by customer. Automatic coding techniques similar to the 702 Autocod System are being prepared. Symbolic coding methods and assembly programs are available. Sales Engineering - Engineers are available to assist in preparing the site for physical installation. This assistance begins twelve months in advance of delivery.

ILLIACILLIAC Illinois Automatic Computer MANUFACTURER University of Illinois Urbana, Illinois OPERATING AGENCY University of Illinois GENERAL SYSTEM NUMERICAL SYSTEM Application Scientific research calculations Internal number system Binary Use of Iliac for the month of June 1955. Binary digits per word 40 Hours Binary digits per instruction 20 Regular Maintenance and Illiac Engineering 58:59 Binary digits per instruction not decoded 12 Unscheduled Maintenance or Repair 25:50 Instructions per word 2 Drum Engineering 50:56 Total no. of instructions decoded 112 Leapfrog 62:58 Total no. of instructions used 62 R.A.R. 5:55 Arithmetic system Fixed-point Wasted 1:25 Instruction type One-address Code Demonstrations 1:12 Number range -l to +1 -2^{-39}, inclusive Use By Departments. ARITHMETIC UNIT Computer Group 17:29 Add time(excluding storage access) 24 microsec Classes 1:40 Multiply time(" " ")600 to 750 microsec Physics 82:16 Divide tine(" " "")850 nicrosec Control Systems lab. 57:02 Construction Vacuum-tubes Structural Research 5:00 Number of rapid access word registers 6 Structural Research (AF 24994) 25:25 Basic pulse repetition rate Asynchronous Psychology 8:52 Arithmetic Mode Parallel Psychology (AF 25726A) 16:51 Education 5:41 STORAGE Microsec Electrical Engineering 17:18 Media Words Access Chemistry 9:19 Electrostatic(Williams) 1024 18 Agriculture 20:54 Magnetic Drum 2048 1024 (min) Cosmotron 25:55 Maximum drum access time is 17,000 microsec. Indiana University 5:36 Another Magnetic Drum storage unit of 12,800 Miscellaneous 38:40 word capacity and 528 microsec minimum access ----- time has been proposed. All words have 40 558:15 binary digits. Timing Asynchronous Operation Sequential INPUT MANUFACTURING RECORD Media Speed Number produced 1 Illiac (See lAS Computer) Tape Reader 500 char/sec Silliac, a copy of the Illiac is under The tape reader is photoelectric, utilizing 5- construction by the Univ. of Sydney(Australia) hole tape and a special instruction for alpha numeric characters. COST Approximate cost of basic system $500,000 OUTPUT Media Speed PERSONNEL REQUIREMENTS Paper Tape(teletype Tape Punch) 20 char/sec Daily Operation No. of Eng. No. of Tech. Printed Page(teletype Page Printer) 5 char/sec Three 8-hour shifts 5 5 Cathode Ray Tube 1000 spots/sec The CR1 has a 256 x 256 raster and automatic RELIABILITY AND OPERATING EXPERIENCE camera controls are used for image photography. Date unit passed acceptance test 1 Sep 52 Average error free running period 8 hours NUMBER OF CIRCUIT ELEMENTS Operating ratio 0.95 Good time 19 hours/day Tubes 2799 Attempted to run 20 hours/day Tube types 20 No. of different kinds of plug-in units 1 No. of separate cabinets(excluding power and PHYSICAL FACTORS air cond.) 5 Power consumption, Computer 18.5 K.W. Four hours/day assigned to routine maintenance. Space occupied, Computer 400 cu ft 50 sq ft Total weight, Computer 2000 lbs ADDITIONAL FEATURES AND REMARKS Power consumption, Air cond. 5.5 K.W. The Cathode-ray tube output. Space occupied, Air cond. 250 cu ft 50 sq ft Mathematical Research and Programming work is Capacity, Air Cond. 5 tons supported in part by ONR Contract N6 ori-07130.