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Information Technology Pioneers

Retirees and former employees of Unisys, Lockheed Martin, and their predecessor companies

In this Chapter

Click/tap to scroll down:

Printed Circuit Cards

Memory Modules

Power Supply assemblies

Artifacts Chapter

Webster defines ARTIFACTS as "An object produced or shaped by human workmanship; especially, a simple tool, weapon, or ornament of archaeological or historical interest."
For our Legacy, we've identified artifacts as 'historical interest' publications, hardware, photos, web and other objects which document or illustrate our history. As we have been collecting these objects - they are catalogued and donated to either the Lawshe Memorial Museum or to the Charles Babbage Institute.
The sections below are a bit incomplete as we take snapshots of contributed items then get the pictures linked.  Note that trinkets, plaques, awards, and desk top items pictured in the Mementos Chapter may not be kept because storage and display space at the museum is limited. After photo's are made and digitized, some objects are returned to the donor.

Models

The first models contributed to the Legacy project were the NTDS computer family models shown at the right from Lowell Benson. In the late '80s, he rescued these from a marketing office in Red Bank NJ, which was being closed. These are now at the Lawshe Memorial Museum.

The Computer's chapter has a table which identifies and provides characteristics of these ruggedized Navy and Marine computers.  Left to right these are:

AN/USQ-17 CP-642A CP-642B CP-667 CP-789 CP-808 CP-848 CP-855 CP-890 AN/UYK-7

This CPF ship model [Canadian Patrol Frigate] was donated to the Legacy project by Dave Kolling. Refer to the Systems, International chapter for the system development story. As part of this system, we developed a manufacturing and engineering support facility in Winnipeg. Search for SHINPADS or AN/UYK-502 or Abbot to find more of the stories about this system.

The P-3C airplane model came from Jim Rapinac. The original computer aboard this Anti-Submarine Warfare Lockheed aircraft was the CP-901 that had a 25 year production run and a 45 year operational life. Refer to the Systems, Airborne chapter or to the People, They Flew chapter to learn more. Or read the book "Hunt for Red October"!

2. Hardware: Printed Circuit Cards, Memory, & Power Supply

2.1 Printed Circuit Cards

Click on the blue file name in the photo link column to see the object's image. Thanks to Larry Bolton for he pictures and this extensive linked spreadsheet.

Description Company
brand		 Company
Part Number		 Other
Markings		 Photo link Age Size
(H x W x D)
inches		 Equipment
System		 Donor
PC Card, 100-pin SEM B format, ceramic, double sided, "Interface Type B/PIC". Has 23 20-pad lcc, 4 hybrids, and 4 Micro-Rel 76-pad lcc. Designed 10/83 by B. Nelson & B. Oxborough. Sperry 7237305-02 Rev. P, Interface Type B/PIC, SN 03399
M28787/502		 img_2109_RJ.JPG 1987 1.9x5.8x0.3 UYK-44
PC Card, 100-pin SEM B format, ceramic, double sided, "Memory Data". Has 57 20-pad lcc and AM2960 in 52-pad lcc. Designed 4/84 by Jim Baker & Don Hayden. Sperry 7221575-00X Rev. 1A, Memory Data img_2104_RJ.JPG 1984 1.9x5.8x0.3 SQS-53C
PC Card, 100-pin SEM B format, Kevlar, single sided, unpopulated thru-hole board with heat ladder frame and connector. If fully completed, it would become a 7237385 card (see elsewhere in the archive). Sperry 7237387-03
214629-1D		 img_2110_RJ.JPG 1.9x5.8x0.3 UYK-44
PC Card, 100-pin SEM B, ceramic, double sided, "Emulation Control II". Has 52 20-pad lcc and a hybrid resistor pack. Designed 11/81 by R. Ebright & L. Slechta. Sperry/Univac 7103605-01 Rev. 2A, SU 00112
M28787/530		 img_2104_RJ.JPG 1982 1.9x5.8x0.3 UYK-44 Dallas Fogg
PC Card, 100-pin SEM B, thru-hole FR4 board w/ heat ladders, single sided, "Temperature Sensor". Has 6 Dual-In-Line packages and numerous R, C, Diodes and transistors. Designed 5/84 by R. Ebright, J. Staubus, & D. Pawlicki. Sperry 7237385-04 Rev. Y, SN 00374 img_2110_RJ.JPG 1984 1.9x5.8x0.3 UYK-44
PC Card, 100-pin SEM B, thru-hole FR4 board w/heat ladders, single sided, "Direct Memory Access I". Has 10 Dual-In-Line packages and numerous R, C, Diodes, and Transistors. Designed 6/82 by R. Ebright, D. Senechal, & J. Parker. Sperry 7103555-01 img_2099_RJ.JPG 1984 1.9x5.8x0.3 UYK-44
PC Card, 100-pin, SEM B format, Ceramic, Double sided, "Multiply/Math Pac" or "Memory Unit, Mathpac". Has 49 20-pad lcc and one TRW 1010 multiplier in 68-pad lcc. Designed 10/83 by B. Oxborough. Sperry 7237240-02 Rev. F, SN 01062
M28787/523		 img_2104_RJ.JPG 1983 1.9x5.8x0.3 UYK-44
PC Card, 100-pin, SEM B format, ceramic, single sided, "Microprocessor, 68000, NAH GE". Has 10 lcc plus a Thomson 68000 processor in 68-pad lcc. Designed for a GE program 3/87 by R. Ebright & J. Antoniou. Sperry 7174635-00 Rev. A, SN 00014 img_2101_RJ.JPG 1987 1.9x5.8x0.3 Tri-SEM
PC Card, 112-pin w/ dual 56-pin connectors, triple wide, MIL-STD-188C, Type II, 2-Channel, Async Output, 75, 150, 1200, 2400. Uses one of the first gate arrays (132 gates) to implement a custom function (7904199). Sperry/Univac 7133255-01 Rev. C, S/N 1013 IMG_1885.JPG 1974 4x13x0.25 UYK-20
PC card, 112-pin, "Lower Diverter" Sperry/Univac 7093390-01 Rev. K, S/N 18391 IMG_1871.JPG 1985 3.3x6.0x0.2 UYK-7 DDMFM
PC card, 112-pin, conduction cooled, "Sense Digit" Sperry/Univac 7093385-00 Rev. E, S/N 227 Card112pin.jpg 1975 3.3x6.0x0.2 UYK-7 DDMFM
PC card, 112-pin, conduction cooled, "Sense Digit" Sperry/Univac 7093385-06 Rev. V, S/N 129331 IMG_1871.JPG 1985 3.3x6.0x0.2 UYK-7 DDMFM
PC card, 150 pin (female), FR4, double sided, conduction cooled to top edge, ECL-based 7137845-00 S/N 1001 IMG_1978.jpg 1974 2.2x6.4x0.3 STV (IR&D System Test Vehicle)
PC card, 150 pin (female), FR4, double sided, conduction cooled to top edge, ECL-based. 7137982-00 S/N 1001 IMG_1979.JPG 1974 2.2x6.4x0.3 STV (IR&D System Test Vehicle)
PC Card, 15-Pin In-Line, three logic types of cards. One has single transistor, one has two, and another has four. ERA 9118, 18344, 1134 IMG_3884.JPG 1956 2.0x2.5x0.6 Transtec? Wayne Olson
PC Card, 15-Pin In-Line, Philco PNP germanium transistors, three logic types of cards ERA 333, 333M, 433M Transtec3.jpg 1956 2.0x2.5x0.6 Transtec
PC Card, 15-Pin In-Line, Philco PNP germanium transistors, three logic types of cards ERA 233M, 333M, 523M 1956 2.0x2.5x0.6 Transtec Don Weidenbach
PC Card, 15-Pin In-Line, uses saturated core logic and a single transistor along with diodes, one logic type of card. One has transistor missing. ERA T02 IMG_3883.JPG 1956 2.0x2.5x0.6 Magtec/Transtec? Wayne Olson
PC Card, 15-Pin In-Line, uses saturated core logic, no transistors but does have diodes, three logic types of cards. Similar to those shown in a paper describing the incremental computer. ERA 1008, 1017, 2106 Magstec3.jpg 1956 2.0x2.5x0.5 Incremental Computer,
Magtec
PC card, 15-pin, "+18 Volt Regulator", designed 8/1965 by J. Bruder and Jack Metzger. Univac 7104480-00 Card15pin_3.jpg 1967 1.6x2.6x0.35 CP-642B/USQ-20B
PC card, 15-pin, "Clock Output Driver Amplifier". Later renumbered as 7000160 which was designed by Jack Metzger in 11/1964. 250160 1591 USQ20A.jpg 1960 1.6x2.6x0.35 USQ-20
CP-642A
PC card, 15-pin, "Driver Amplifier", designed by Bob Wyland and Jack Metzger in 7/1965. Univac 7002013-00 USQ20B.jpg 1966 1.6x2.6x0.35 CP-642B/USQ-20B
PC card, 15-pin, "Flip-Flop with 2222 And Or with Clear" Univac 7002000 1963 1.6x2.6x0.35 CP-642B/USQ-20B Don Weidenbach
PC card, 15-pin, "Flip-Flop" (actually a dual flip-flop), gold plated pins, tall Sprague 520H transistors are laid down. Later renumbered as 7000420 which was designed by R. Sorensen and Jack Metzger in 7/1963. Card has been donated to the Bicentennial project for inclusion in a container to be opened in 2058. 250420 5191 USQ20A.jpg 1960 1.6x2.6x0.35 USQ-20
CP-642A
PC card, 15-pin, "Inverter Gates, AND 3-3-2", designed by R. Sorensen and Jack Metzger in 7/1963. Univac 7002060-00 USQ20B.jpg 1962 1.6x2.6x0.35 CP-642B/USQ-20B
PC card, 15-pin, "Matched Sense Amplifier". No reason given for the incorrect 7002290 marking. Card designed 1/1964 by J. Domka and Jack Metzger. Univac 7002850 7002290 USQ20B.jpg 1963 1.6x2.6x0.5 CP-642B/USQ-20B
PC card, 15-pin, "Sense A Amplifier", designed 12/1963 by John Domka and Jack Metzger. Univac 7002570-00 1966 1.6x2.6x0.35 CP-642B/USQ-20B
PC card, 15-pin, "Solenoid Driver Amplifier", designed 5/1964 by John Domka and Jack Metzger. Univac 7003010-00 Card15pin_2.jpg 1965 1.6x2.6x0.35 CP-642B/USQ-20B
PC card, 15-pin, "Strobe Pulse Shaper A", designed 8/1963 by R. Sorensen and Jack Metzger. Univac 7002460-00 USQ20B.jpg 1966 1.6x2.6x0.35 CP-642B/USQ-20B Lowell Benson
PC card, 15-Pin, four transistors, "Relay Puller Driver Amplifier". Later renumbered as 7000440 which was designed by R. Sorensen and Jack Metzger in 7/1963. Univac 250440 9658 USQ20A.jpg 1963 1.7x2.6x0.5 USQ-20
CP-642A		 Harvey Taipale
PC card, 15-pin, gold pins, with mating connector, 250170 1.6x2.6x0.35
PC card, 15-pin," -20 Volt Regulator", no color code edge Univac 4223860-00 Card15pin_1.jpg 1968 1.6x2.6x0.35 USQ-20
PC card, 18-finger w/4 power/gnd fingers 846 5782 IMG_3849.JPG 1962 4.25x2.9x0.8 1107 Don Weidenbach
PC card, 18-finger w/4 power/gnd fingers 846 46B3 1082 IMG_3849.JPG 1962 4.25x2.9x0.4 1107 Don Weidenbach
PC card, 18-finger w/4 power/gnd fingers 846 44E1 1508 IMG_3849.JPG 1962 4.25x2.9x0.4 1107 Don Weidenbach
PC card, 250-pin SEM B format, Kevlar substrates, double sided, double space, UYK-44 EP "Instruction Processor". One of two cards in the EP to use the five row 250-pin connector. Has 2 Xicor FPGA in thru-hole PGA package. Designed 10/91 by D. Senechal & P. Burley. Unisys 7359519-06 Rev. H, SN 00086
M28787/475-2		 img_2102_RJ.JPG 1994 1.9x5.8x0.6 UYK-44 EP
PC card, 27 pin, with guide pins and 13 ground fingers, "Emitter Line Pre-Driver", appears to be a triple circuit function (3 transistor pairs, one type WE GF-40154 TO-18, the other a Univac 7901426 (Mot SS1501H) Silicon PNP TO-5). With mating backplane connector. 17773
Mfd by Univac		 11250890
or
7250890		 Rev. 0 EL
Ser 48
PCB 11250391		 IMG_3839.JPG 1966 3.0x3.0x0.4 Nike-X Don Wiedenbach
Larry Bolton (connector)
PC card, 27-pin, "AND-OR Flip-Flop, 2(330/3)", has six Motorola SC90, SC92, and SC94 hybrid circuits in 10-lead TO-5 cans on board (Ref. Univac 790003x series circuits). These are the first hybrid integrated circuits used by Univac Defense Systems. 4224080-00 CP-667x3.jpg 1963 1.8x2.2x0.3 CP-667
PC Card, 27-pin, "Data Line Amplifier" Univac 4224310-00 CP-667x3.jpg 1966 1.8x2.2x0.3 CP-667
PC card, 27-pin, "Sense Amplifier", #426, has two dual transistor devices in cans Univac 4224260-00 4051453-00 CP-667x3.jpg 1965 1.8x2.2x0.3 CP-667
PC Card, 300-pin, dual connector, "Cache Directory" Sperry/Univac 5990832-00 Rev. A, S/N A030, Cache Directory CardUYK43Mem.JPG 1984 8x10x0.7 Memory Processor
PC card, 32-finger triangular, 64 diodes, four line pair terminal posts 4035944 IMG_3851.JPG 1962 4.25x3.45x0.25 1107 Don Weidenbach
PC card, 33 pin, metal frame plug-in, hole in pcb to aid in pulling out, 4 tube sockets, with one 6350/K7J Sylvania 9-pin computer tube. Used in File Computer main chassis. RR Univac 123640-2 Type 495-139A1 IMG_3848.JPG 10.2x4.6x0.7 File Computer chassis Don Weidenbach
PC Card, 33-pin, 1 bit of entire arithmetic section of a 24-bit computer, uses bi-directional data transmission. Twelve transistors. Designed by D. Mager, J. Bruder, and J. Lee in spare time. Led to patent by D. Mager for Sperry Rand. Is bolted to mating chassis connector. Card33pin.jpg 1964 5.5x6x0.75
PC card, 33-pin, metal frame plug-in with handle, has 5 RRU Type 155D1 coil wound, possibly used in the paper tape to magnetic tape converter part of the Tele-control unit of the File Computer. RR Univac 497-106A1 Gated Amp IMG_1826.JPG right side 1957 6.7x4.9x0.8 File Computer
or TACS
PC card, 33-pin, metal frame plug-in with handle, has 8 RCA 2N269 transistors, possibly used in the Tele-control unit of the File Computer. RR Univac 497-101A1 Flip Flop IMG_1826.JPG left side 1957 6.7x4.9x0.8 File Computer
or TACS
PC Card, 40-pin, SEM A format, 12-2 input NAND gates. Fully encapsulated module made by Centralab Electronics. 2658634P1,
CT02618		 1970 2x2.5x0.25
PC Card, 40-pin, SEM A format, holds up to four 16-pin DIP IC packages. This is a 2-2-2-2 And-Or-Invert function. 7092619 IMG_1987.JPG 1972 2x2.5x0.25 NSWC Mike Bukovich
PC card, 55-pin, 1108/494 IBM Interface Univac 7080320-00 CardIO.JPG 1968 8x6x0.7 1108
PC card, 55-pin, 1108/494 IBM Interface Univac 7080330-00 CardIO.JPG 1968 8x6x0.7 1108
PC card, 56-pin with T bar, "I/O Sequence Control", has 20 Raytheon RM1000 and Motorola SC901 which are 7901000 and 7901001 chips. Designed 8/1966 by Dave Zemke and Dave Duncan. Sperry Univac 7111095-02 Rev. P, Ser 474 IMG_1671.JPG 1976 3.5x3.4x0.2 CP-901
PC Card, 56-pin, "Channel Interface", air cooled, uses standard TTL logic including a General Instrument UART. Designed 4/1973 by Lowell Benson. Superceeded in 1975 by 7099176-00 probably due to obsolescence of the UART. Sperry/Univac 7099175-04 S/N 1014 IMG_1869.JPG 1974 4x4x0.3 UYK-15, 1616, UYK-20 7119512 Proc. Interrupt RS-232 Serial Channel Feature
PC Card, 56-pin, "Control Logic Module, Type 10", has 20 early 7901001-01 chips, card shows rework. Designed 9/1968 by Dave Zemke and John Domka. Univac 7111216-00 Rev. A, S/N 055 7901001oncard.jpg 1968 3.4x3.4x0.25 CP-901, 1830B Curt Nelson
PC Card, 56-pin, "Read/Write Current Regulator", Uses 7901001 and dual transistors. Designed 7/1966 by Dave Duncan. Univac 7056665-07 Rev. AB, S/N 237 IMG_1873.JPG 1968 3.4x3.4x0.4 CP-901? Curt Nelson
PC Card, 56-pin, air cooled, no T bar, "-3V Data Line Driver Amplifier", has early Westinghouse WS287 and Raytheon RM1004 chips on board (7901003 and 7901004). Designed 7/1967 by Mel Wagner. Univac 7500800-00 Rev. B, S/N A0277 IMG_1980.JPG 1967 3.5x3.5x0.3 7078027 Drawer Assy (1219?)
PC Card, 56-pin, air cooled, no T bar, "-3V Input Amplifier", has early Westinghouse WS286 and WS287 chips on board (7901003 and 7901004). Designed 7/1967 by Mel Wagner. Univac 7500820-00 Rev. B, S/N A0258 IMG_1980.JPG 1968 3.5x3.5x0.3 7078027 Drawer Assy (1219?)
PC Card, 56-pin, air cooled, no T bar, "Read/Write Drive Diverter", has Raytheon RM1001 chips (7901001) on board. Designed 2/1968 by D. Ripley. Univac 7500421-00 Rev. C, S/N A0150 IMG_1874.JPG 1968 3.5x3.5x0.3 1219B, 7053750 Memory, 7078028 Drawer
PC Card, 56-pin, air cooled, no T bar, "Sense and Inhibit Amplifier", has four 7901001 type ICs and transistors, copper foil shield on back. Designed 9/1967. 2800650-00 Rev. 0, S/N A0100 Card56pin_06.jpg 1968 3.4x3.4x0.3 CP-890/C-3
PC Card, 56-pin, air cooled, no T bar, "SVC Commutator", has two large inductors and six high power resistors on card. Designed 5/1968 by Bob Wyland. Univac 2800930-01 Rev. D, S/N C195-Z9 Card56pin_09.jpg 3.4x3.4x0.8 CP-890/C-3 Larry Bolton
PC Card, 56-pin, Conduction cooled to side edge, vertical bus bars, Engineering prototype, uses standard TTL logic. Possibly never released to production. Univac 7091405-00 S/N 0001 ENG IMG_1667.JPG 1971 4.0x4.0x0.25 UYK-1616, UYK-15, UYK-20, UYK-23 Mike Bukovich
PC Card, 56-pin, conduction cooled, with top T bar, "Analog Signal Selector", uses transistors and 0.01% tolerance resistors. Designed 9/1969 by J. Bergman. Univac 7123585-00 Rev. 0, S/N 006 Card56pin_03.jpg 1970 3.4x3.4x0.2 OU-95 ICKCMX
PC Card, 56-pin, conduction cooled, with top T bar, "Control Line Driver", uses transistors and 7901001. Designed 4/1968. Univac 7111510-00 Rev. G, S/N 488 IMG_1873.JPG 1971 3.5x3.5x0.3 UYK-7 Trainer,
UYK-8
PC Card, 56-pin, conduction cooled, with top T bar, "Main Delay Line 2", Newer design uses standard Schottky TTL logic and 4 delay lines. Designed 8/1977 by D. Weiss. Sperry/Univac 7165535-01 Rev.E, S/N 6292 IMG_1873.JPG 1987 3.5x3.5x0.3 UYK-7 DDMFM
PC Card, 56-pin, conduction cooled, with top T bar, "Relay Driver Amplifier", has four large 2PDT electro-mechanical relays and three 7901001 ICs mounted on it. Designed 7/1969 by S. Frase. 7123600 Marking is via an adhesive label, not ink. Card56pin_05.jpg 1970 3.4x3.4x0.5 OU-95 ICKCMX Larry Bolton
PC Card, 56-pin, no T bar, "Sense and Inhibit Amplifier", uses 7901004 chips and transistors. Designed 8/1970 by Jim Warwick. Univac 7500651-00 Rev. D, S/N A6217 IMG_1870.JPG 1968 3.4x3.5x0.2 1219B Memory
PC card, 56-pin, with T-bar, "A/Q Register", has 20 Westinghouse WS283 and WS282 which are the early 7901000 and 7901001 series devices. Designed 1/1968 by L. Boisclair. Univac 7111640-00
(black ink)		 SN-01, 7111644 Card56pin_01.jpg 1967 3.5x3.4x0.2 CP-901? Mike Bukovich
PC card, 56-pin, with vertical bus bars, air cooled, no T bar, engineering experimental or demo card, unmarked integrated circuits Univac EXP MSI 8 IMG_3838.JPG 4.2x3.75x0.25 Don Weidenbach
PC Card, 80-pin early SEM B format, FR4 thru-hole board, single side, dual 40-pin connectors, holds up to ten 16-pin Dual-In-Line circuits but this card has 9. It does not appear that documentation for this card was released. Function unknown. Univac 7092632-00 7092630-00 img_2100_RJ.JPG 1972 1.9x5.8x0.3 Mike Bukovich
PC Card, dual 279 pin 3-row connectors, one each end, "Breakpoint". Designed 1984 by W. Gustafson and D. Kaminski. Has 14 Sperry 8130643 Breakpoint bipolar gate arrays (series ST-101), 902 gates each. Sperry 7238244-03 T Ser. No. 0906 IMG_3969m.jpg 1987 12.9x8.3x0.4 UYK-43 W. Thorkildson
D. Gangelhoff
Photo-interrupter, custom made, milled from a phenolic block and aluminum. Uses an incandescent lamp and unidentified photo sensor. Could be used to detect rotational or linear position. Has a 1/4" slot. Optical openings are 1/10" diameter. IMG_3655n56.jpg 1.2x1.6x0.55

15-Pin Notebook by Larry Bolton

The following have dark blue connectors with gold plated pins, presumbaly used by USQ-20A

  • 250070 Inverter 2-3-3 (replaced by 7000070)
  • 250160 Amplifier, Driver – Clock Output ((replaced by 7000160)
  • 250420 Flip Flop (1961 vintage? replaced by 7000420)
  • 250440 Amplifier, Driver – Relay Puller (replaced by 7000440)
  • 4223860 Regulator, Voltage, -20V

The following have blue green connectors with tin plated pins, presumably used by USQ-20B

  • 7002013 Amplifier Driver
  • 7002060 Inverter, And 3-3-2
  • 7002180 Switch, Positive and Negative
  • 7002460 Shaper, Strobe Pulse – A
  • 7002570 Amplifier, Sense – A
  • 7002290 Amplifier Output, Sense #2
  • 7002850 Amplifier, Sense Matched (dual transistors matched)
  • 7003010 Amplifier, Driver – Solenoid
  • 7104480 Regulator, Voltage, +18V
  • 7003530 Regulator, Voltage Bias, Supply #2
  • 7003691-00 Memory Current Diverter

Review of vault microfilm and the title block of each drawing

  • 7000070 Designed 1963 by H. Barrett and R. Miller
  • 7000160 Designed Nov. 1964 by J. Metzger
  • 7000420 Designed July 1963 by R. Sorensen and J. Metzger
  • 7000440 Designed July 1963 by R. Sorensen and J. Metzger
  • 7002013 Designed July 1965(?) by R. Wyland and J. Metzger
  • 7002060 Designed July 1963 by R. Sorensen and J. Metzger
  • 7002180 Designed Nov. 1963 by J. Domka and J. Metzger
  • 7002460 Designed Aug. 1963 by R. Sorensen and J. Metzger
  • 7002570 Designed Dec. 1963 by J. Domka and J. Metzger
  • 7002850 Designed Jan. 1964 by J. Domka and J. Metzger
  • 7003010 Designed May 1964 by J. Domka and J. Metzger
  • 7003530 Designed Oct. 1964 by R. E. Phelps and A. Z. Kazynski
  • 7104480 Designed Aug. 1965 by J. Bruder and J. Metzger

Also, referenced in the Boslaugh book “When Computers Went to Sea” 250090 Inverter, Indicator Driver (triple) – From about 1962, had three Motorola SA252 transistors in TO-5 can. Probably 4907979 PNP Geranium High Voltage

2.2 Memory Hardware

At the left is a rotating magnetic drum model 1119A. In the center is rotating magnetic drum model 1124G1. At the right is a rotating magnetic drum model 1124A. These three drums are at the Lawshe Memorial Museum. One came from the estate of Harry Wise, the other from Donald Anderson.
   

 

 

 

 

 

 

 

 

Below left are some film memory layers - at the right is a core memory plane:

 

 

 

 

 

 

 

 

 

This is a 6" x 9" printed circuit card holding Randon Access Memory chips and a Bubble Memory component on the right.

 

2.3 Power Supply Modules

this section is yet incomplete.