Category: Mainframes
IBM Presents the 650 Magnetic Drum Data Processing Machine

1955
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At one time a computer was simply a computer. When, in the mid-1960s, firms such as DEC and Data General began marketing their mini-computers, the term “mainframe” (also known as “big iron”) arose to designate the larger general purpose machines provided by firms such as IBM, Univac, etc.

While there is no exact definition, it usually implies a machine capable of large-scale computing tasks demanding high availability, high I/O rates, large storage for online databases, and sometimes even the ability to run multiple operating systems simultaneously.
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Univac 9400 System
1969 ca.
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UNIVAC II
1957
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UNIVAC Scientific at the White Sands Missile Range
1953
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Univac Scientific Computing System Model 1103A
1957
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Univac solid-state computer ...a major breakthrough for Business- America
1958
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What should Industrial Management expect from a computer?
1960
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