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Objects in Harvard IBM Mark I Automatic Sequence Controlled Calculator Collection

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Objects in Harvard IBM Mark I Automatic Sequence Controlled Calculator Collection

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comparative display of old cam with IBM ASCC-Mark I cam

International Business Machines Corporation

1930-1937

comparative display of standard counters and later IBM ASCC-Mark I counters

International Business Machines Corporation

1929-1938

comparative display of standard wire contacts and later IBM ASCC-Mark I contacts

International Business Machines Corporation

1929-1938

fragment of Babbage's first difference engine

Charles Babbage

1822-1834, reassembled in 1886

IBM ASCC-Harvard Mark I photo album

International Business Machines Corporation

1944

IBM ASCC-Mark I cams, counters, and relays

International Business Machines Corporation

1939-1944

IBM ASCC-Mark I card weight, paper guide, two multiprong relays

International Business Machines Corporation

circa 1944

IBM ASCC-Mark I chain link

International Business Machines Corporation

circa 1944

IBM ASCC-Mark I computer framed photograph

Harvard Computation Laboratory

1945-1955

IBM ASCC-Mark I model 5 single coil

International Business Machines Corporation

circa 1944

IBM ASCC-Mark I model 6 latch

International Business Machines Corporation

circa 1944

IBM ASCC-Mark I paper-tape punch station

International Business Machines Corporation

1939-1944

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