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 151,130 records.
Millionaire calculator
Hans W. Egli Co
Physical object, 1895
B136.81
Millionaire calculator
Hans W. Egli Co
Physical object, 1895
X253.83
Millionaire mechanical calculator stand
Hans W. Egli Co
Physical object, 1895
B161.81B
Millionaire mechanical calculator
Hans W. Egli Co
Physical object
102624100
Millionaire mechanical calculator
Hans W. Egli Co
Physical object, undated
B17.78
Millionaire mechanical calculator
Hans W. Egli Co
Physical object, 1895
B161.81A
Millionaire mechanical calculator
Hans W. Egli Co
Physical object, ca. 1930
XB1.75
Millionaire mechanical calculator
Hans W. Egli Co
Physical object, 1895
X121.83
Millionaire mechanical calculator face plate
Physical object, undated
102677149
Millionaire mechanical calculator face plate
Hans W. Egli Co
Physical object, undated
102677148
Millionaire mechanical calculator number input slide switch
Physical object, undated
102677150