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.
"Model K" Adder (replica)
Still image, 2010
102798612
Pascal Adder (Pascaline) - replica
Still image, 2010
102798214
Schickard Calculator - replica
Still image, 2010
102798219
Brown Box replica
Still image, 2010
102798098
Zuse 1 binary gate (replica)
Still image, 2010
102798607
Oversized replica of Napier's Bones Exhibit
SITES
Still Image, Circa 1980
102622413
Babbage Difference Engine No. 1 Demonstration Piece - three-quarter-scale replica
Still image, 2010
102798212
Ed Clark receives a replica of a transistor from Bob Major at the formal dedication of Fairchild, Australia Pty. Ltd.
Still image, 1966-05-10
102695815
Stibitz Model K Adder
Bell Laboratories
Still Image, Circa 1939
102627225
Pascal Adder - Pascaline
Still Image
102710252
Jaquard Loom and Scheutz difference engine
Still Image
102689078