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 151,033 records.
Simulation equations
Document
102634667
"Rug" problem
Document
102636218
Calculations
Document
102635561
Slow-down signal
Document, 1958-10-21
102632530
Channel adapter
Document, 1958-11-10
102632535
Shared variables
Document, 1971-05-10
102632321
Split memory cycles
Document, 1957-05-10
102632693
Exchange busy indicator
Document, 1957-07-09
102632706
Buffering
Document, 1956-04-12
102632275
Exchange communication specifications
Document, 1957-04-18
102632686
Logic simulator
Document, 1958
102634966
Automatic program interrupt control
Document, Circa 1955
102632679
Stretch instruction set
Document, 1955-10-20
102632232
Reorganization
Document, 1958-03-31
102634997
Table searching
Document, 1958-05-23
102635072
Multiprogramming - Codd
Document, 1959-04-13
102635084
Possible plans
Document, 1961
102632636
Occupancy blueprint
International Business Machines Corporation (IBM)
Document, 1963-12-16
102679296
Blank 701 calculator programming forms
Document
102634663
Scientific marketing newsletters
International Business Machines Corporation (IBM)
Document, 1969
102679614