Other Mainframe Manufacturers During The 1960s and 1970s
- Scientific Data Systems (later known as Xerox Data Systems after its purchase by Xerox in 1969) also sold mainframe computers, but with around 1% marketshare, it was not a major factor in the marketplace. Xerox closed the division in 1975, with most rights sold to Honeywell.
- In 1976, Cray Research (a company supported by Seymour Cray's former employer Control Data Corporation), released the Cray-1 vector computer.
- Digital Equipment Corporation (DEC) was founded in 1957 to manufacture computer components, and made many small computers, notably the PDP series. These computers were classified as minicomputers rather than mainframes, but often competed for the same business. DEC later sold to Compaq, which was acquired by HP.
- Hewlett-Packard (HP) was founded in 1939 manufacturing advanced electronic equipment. In the mid-1960s HP started producing minicomputers, which competed with mainframe computers.
- Amdahl Corporation was founded in 1970 by Dr. Gene Amdahl, a former IBM employee, is an information technology company which specializes in IBM mainframe-compatible computer products. It is a wholly owned subsidiary of Fujitsu since 1997.
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