Mainframe — machines class
14 machines in the mainframe class.
| Name | Years | Status | Class | Manufacturer |
|---|---|---|---|---|
| LEO I | 1951–1965 | Dead | Mainframe | J. Lyons & Co. |
| UNIVAC I | 1951–1963 | Dead | Mainframe | Eckert–Mauchly / Remington Rand |
| IBM 701 | 1952–1955 | Dead | Mainframe | IBM |
| IBM 650 | 1953–1962 | Dead | Mainframe | IBM |
| IBM 704 | 1954–1960 | Dead | Mainframe | IBM |
| Ferranti Pegasus | 1956–1962 | Dead | Mainframe | Ferranti |
| IBM 709 | 1958–1962 | Dead | Mainframe | IBM |
| IBM 7090/7094 | 1959–1969 | Dead | Mainframe | IBM |
| Burroughs B5000 | 1961–1968 | Dead | Mainframe | Burroughs |
| Ferranti Atlas | 1962–1971 | Dead | Mainframe | Manchester / Ferranti |
| IBM System/360 | 1964–1978 | Dead | Mainframe | IBM |
| GE-645 | 1965–1973 | Dead | Mainframe | General Electric |
| PDP-10 | 1966–1983 | Dead | Mainframe | Digital Equipment Corporation |
| IBM System z | 2000– | Alive | Mainframe | IBM |