Catalog Search

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.

Search the Catalog

Catalog contains over 144,090 records.

Result 1-2 of about 2

Photoelectric Number Sieve Machine ("Gear Machine")
D. H. Lehmer / Robert Canepa
Physical object, 1932

Base and motor for the photoelectric number sieve machine
D. H. Lehmer / Robert Canepa
Physical object