This is a list of transistorized computers, which were digital computers that used discrete transistors as their primary logic elements. Discrete transistors were a feature of logic design for computers from about 1960, when reliable transistors became economically available, until monolithic integrated circuits displaced them in the 1970s. The list is organized by operational date or delivery year to customers. Computers announced, but never completed, are not included. Some very early "transistor" computers may still have included vacuum tubes in the power supply or for auxiliary functions.
1950s
1953
1954
- Bell Labs TRADIC for U.S. Air Force
1955
- Harwell CADET demonstrated February 1955, one-off scientific computer
1956
1957
- Burroughs SM-65 Atlas ICBM Guidance Computer MOD1, AN/GSQ-33 (no relation to Manchester ATLAS)
- Ramo-Wooldridge (TRW) RW-30 airborne computer
- Univac TRANSTEC, for US Navy
- Univac ATHENA, US Air Force missile guidance (ground control)
- IBM 608 transistor calculator (its development was preceded by the prototyping of an experimental all-transistor version of the 604 demonstrated in October 1954), announced 1955, first shipped December 1957
- DRTE Computer, Canadian experimental system delivered 1957, added parallel math unit and other improvements in 1960.
- ETL Mark IV computer, upgraded to the ETL Mark IV A in 1958, a transistor-based computer built at the Japanese government's ElectroTechnical Laboratory, inspired almost every Japanese computer company.
1958
1959
1960s
1960
1961
1962
1963
1964
1965
1966
1967
- CER-22
- D4a built in 1963 by Joachim Lehmann at the TU Dresden in about 10 exemplars. After modifications produced from 1967 as Cellatron 8201.
- Honeywell 200/8200
1968
1969
See also
Notes
References