Due to the implementation of a new Collection Management System, CHM staff will not be able to assist researchers and in-person visits until March 2025.
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.
Search the Catalog
Catalog contains over 151,024 records.
Cunningham circuit breaker
International Business Machines (IBM)
Physical object, Circa 1957
102688492
4381 Processor Problem Analysis Guide
International Business Machines Corporation (IBM)
Document, 1984-10
102707893
4381 Processor Maintenance Information Vol. A06
International Business Machines Corporation (IBM)
Document, 1984
102707898
4381 Processor Maintenance Information Vol. A03
International Business Machines Corporation (IBM)
Document, 1984
102707901
IBM 2502 read unit functional test deck
Software, Circa 1960
102708199
Magnetic tape read/write head
Matsushita Electric Industrial Co., Ltd.
Physical object
102682538
Plugboard Control Panel Rack
Wright Line, Inc.
Physical object, 1950
X1640.99AV
4245 line printer
International Business Machines Corporation (IBM)
Physical object, 1985
X1640.99N
IBM card roller
International Business Machines (IBM)
Physical object
102696602
3420 MOD 4, 6, 8 ALD Vol. 1
International Business Machines Corporation (IBM)
Document, 1978-1982
102707909
3505B ALD CS to RL and program listings Vol. 2
International Business Machines Corporation (IBM)
Document, 1971-1972
102707911
IBM 4245 Printer Models 12 and 20 Maintenance Information Manual Volume 1
International Business Machines Corporation (IBM)
Document, 1986
102707904
IBM spare parts
International Business Machines Corporation (IBM)
Physical object
102682543
Plugboard Control Panel
International Business Machines Corporation (IBM)
Physical object, 1950
X1640.99AR
3380D DASD (Direct Access Storage Device)
International Business Machines Corporation (IBM)
Physical object, ca. 1985
X1640.99CQ
Card Data Recorder / Keypunch
International Business Machines Corporation (IBM)
Physical object, ca. 1975
X1640.99J
Plugboard
Physical object
102673798
3420 MOD 4, 6, 8 ALD Vol. 1
International Business Machines Corporation (IBM)
Document, 1978-1982
102707908
3505 Card Reader and Control Unit Theory-Maintenance
International Business Machines Corporation (IBM)
Document, 1972-04
102707910
4245 Printer Install New Platen Installation Instructions and documentation replacement pages
International Business Machines Corporation (IBM)
Document, 1987
102707903