From magnetic tape and rare film to lab notebooks and business plans to early mainframes and source code, our collection is as diverse as the history of computing. It is a rich resource for everyone, comprising historical objects, documents, software titles, ephemera, and photographs and moving images.
Note: CHM's online catalog has been updated through January 23rd, 2025. A new and improved catalog will be launched in Summer 2025.
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Catalog contains over 151,130 records.
Relay
International Business Machines (IBM)
Physical object
102688512
Relay
International Business Machines (IBM)
Physical object
102688517
SLT card
International Business Machines Corporation (IBM)
Physical object, Circa 1965
102682526
SMS card
International Business Machines Corporation (IBM)
Physical object, Circa 1959
102682514
SLT card
International Business Machines Corporation (IBM)
Physical object, Circa 1965
102682519
SLT card
International Business Machines Corporation (IBM)
Physical object, Circa 1965
102682521
SLT card
International Business Machines Corporation (IBM)
Physical object, Circa 1965
102682533
IBM Type 3525 Card Punch
International Business Machines Corporation (IBM)
Physical object, 1979
X1640.99B
3803 tape controller
Intermational Business Machines Corporation (IBM)
Physical object, Circa 1979
X1640.99CP
Plugboard
International Business Machines Corporation (IBM)
Physical object
X1640.99BD
Write enable rings
Physical object
102677520
Electronic tube
General Electric Company (GE)
Physical object
102696607
1401 SMS card
International Business Machines (IBM)
Physical object, Circa 1959
102696619
Cunningham circuit breaker
International Business Machines (IBM)
Physical object, Circa 1957
102688483
Cunningham circuit breaker
International Business Machines (IBM)
Physical object, Circa 1957
102688488
Cunningham circuit breaker
International Business Machines (IBM)
Physical object, Circa 1957
102688490
Cunningham circuit breaker
International Business Machines (IBM)
Physical object, Circa 1957
102688495
Highspeed relay
International Business Machines (IBM)
Physical object
102688508
Magnetic tape
Excelan Inc.; Memorex Corporation
Software, ca. 1975-1985
102710142
4381 Processor Maintenance Information Vol. A04
International Business Machines Corporation (IBM)
Document, 1984
102707896