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.
Software Applications Index
Digital Equipment Computer Users Society (DECUS)
Document
102650128
Drum Test
Digital Equipment Corporation (DEC)
Document, 1963-06-17
102650630
Back-search Readinbuffer
Digital Equipment Corporation (DEC)
Document, 1961-11-28
102650135
PDP-1C-2 AC Control
Digital Equipment Corporation (DEC)
Document, 1960
102650793
PDP-1C Special cycles
Digital Equipment Corporation (DEC)
Document, 1963-05-29
102650798
Dectape 555: Chassis Wiring
Digital Equipment Corporation (DEC)
Document, 1963-12-30
102650736
PDP-1C Accumulator
Digital Equipment Corporation (DEC)
Document, 1963-11-20
102650806
Ascii II tape lister
Digital Equipment Corporation (DEC)
Document
102636255
Executive Routine
Digital Equipment Corporation (DEC)
Document, 1970-06-14
102636250
Fixed log base 2
Digital Equipment Corporation (DEC)
Document
102636248
ADA-1A Interface Maintenance Manual
Digital Equipment Corporation (DEC)
Document, 1969
102652388
Text verifier
Digital Equipment Corporation (DEC)
Document, 1975-05-21
102636243
Line display routines
Digital Equipment Corporation (DEC)
Document
102635745
Microtape power control
Digital Equipment Corporation (DEC)
Document
102652439
Administrative Routine (Mystic)
Digital Equipment Corporation (DEC)
Document, 1964-1966
102652542
DECtape Control Type 550 Instruction Manual
Digital Equipment Corporation (DEC)
Document, 1966
102652390
Type 33 card codes and printouts
Digital Equipment Corporation (DEC)
Document
102652415
Basic Instruction Manual (Preliminary)
Digital Equipment Corporation (DEC)
Document
102652403
External Components List
Digital Equipment Corporation (DEC)
Document, 1964-12-09
102652427
PDP-1 Course Workbook
Digital Equipment Corporation (DEC)
Document, 1964
102652395