- than
electronic calculators. Consequently, in
specialized applications,
comptometers remained in use in
limited numbers into the
early 1990s, but with the...
- the only
other competitor in true
commercial production, had sold 100
comptometers in
three years. The 19th
century also saw the
designs of
Charles Babbage...
- the only
other competitor in true
commercial production, had sold 100
comptometers. It wasn't
until 1902 that the
familiar push-button user
interface was...
- not gain
widespread use
until Dorr E. Felt
started manufacturing his
comptometer (1887) and
Burroughs started the
commercialization of
differently conceived...
- men's
lives and
concentrated on a
career in computing, from 1916
selling comptometers in
Belfast in Ireland. She
regularly kept in
touch with C****’s family...
-
Florida Tech Easy
Instructions for
Operation the
Controlled Key
Comptometer,
Comptometer Division, Felt and
Tarrant Mfg. Co., Chicago, 1917, p. 12 Carl...
- the
Comptometer Corporation,
which produced calculating machines and a
telecommunication device called the Electrowriter. In 1965
Victor Comptometer Corporation...
-
built by the Bell
Punch Co. in Britain, and
marketed through its
Sumlock Comptometer division, they used
vacuum tubes and cold-cathode
switching tubes in...
-
designs were
completed in Babbage's lifetime. The
Arithmometer and the
Comptometer are
mechanical computers that are
precursors to
modern digital computers...
- Belgium. Oldham's Australian-born mother,
Celia Oldham, was a
nurse and
comptometer operator.
Oldham attended the
Aylesbury School for Boys,
Cokethorpe School...
