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.
Harwell CADET demonstrated February 1955, one-off scientific computer
1956
Electrotechnical Laboratory ETL Mark III (Japan) experimental, began development 1954, completed 1956,[1] Japan's first transistorized stored-program computer[2][3][4]
UnivacATHENA, 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.[8]
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.[9][10][11][12]
Grabbe, E. M. (February 7, 1957), "The Ramo- Wooldridge Corporation"(PDF), SOME RECENT DEVELOPMENTS IN DIGITAL CONTROL SYSTEMS, Instrumentation and Control in the Process Industries Conference, Chicago, p.5{{citation}}: CS1 maint: location missing publisher (link)
Beck, Robert Mark (30 December 1960). PB-250 - A High Speed Serial General Purpose Computer Using Magnetostrictive Delay Line Storage. 1960 Fall Joint Computer Conference. p.284. doi:10.1109/afips.1960.58. The first production computer was delivered in October 1960.
James P. Anderson; Samuel A. Hoffman; Joseph Shifman; Robert J. Williams (1962), D825 - a multiple-computer system for command & control, Proceedings of the Fall Joint Computer Conference, Spartan, pp.86–96, doi:10.1109/AFIPS.1962.41
Culler, Glen; Huff, Robert (1962), "Managing Requirements Knowledge, International Workshop on", Solution of Non-Linear Integral Equations Using on-Line Computer Control, Proceedings of the Spring Joint Computer Conference, San Francisco, pp.129–138, doi:10.1109/AFIPS.1962.26{{citation}}: CS1 maint: location missing publisher (link)
Davis, E.M.; etal. (April 1964). "Solid Logic Technology: Versatile, High-Performance Microelectronics". IBM Journal of Research and Development. 8 (2): 102–114. CiteSeerX10.1.1.87.4832. doi:10.1147/rd.82.0102. A new microelectronics technique called Solid Logic Technology, or SLT, is utilized in the new family of IBM/360 computers. This new technology provides a hybrid, integrated circuit module which combines discrete, glass-encapsulated silicon transistors and diodes with stencil-screened land patterns and precision passive components.
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