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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Nihon Tokyo Daigaku Denshi Keisanki Senta [University of Tokyo, Japan, Computer Center]
1964
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On April 7, 1964 the entire concept of computers changed
1964
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Philco TRANSAC S-2000: World's fastest all-transistor data processsing system
1958
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Premiere of Products
1959
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Programming Conventions Univac II Data Automation System
1957
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RCA 501 Electronic Data Processing System
1958
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RCA Spectra 70
1965
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RCA Spectra 70: Data gathering system
1968
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SDS 900 Series: A new generation of low cost general purpose digital computers
1962
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Some facts about the Control Data 6600
1963
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