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The TOPS-20 operating system by Digital Equipment Corporation (DEC) was a proprietary OS for the PDP-10 mainframe computer.TOPS-20 began in 1969 as the TENEX operating system of Bolt, Beranek and Newman (BBN) and shipped as a product by DEC starting in 1976. TOPS-20 is almost entirely unrelated to the similarly named TOPS-10, but it was shipped with the PA1050 TOPS-10 Monitor Calls emulation facility which allowed most, but not all, TOPS-10 executables to run unchanged.

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  • The TOPS-20 operating system by Digital Equipment Corporation (DEC) was a proprietary OS for the PDP-10 mainframe computer.TOPS-20 began in 1969 as the TENEX operating system of Bolt, Beranek and Newman (BBN) and shipped as a product by DEC starting in 1976. TOPS-20 is almost entirely unrelated to the similarly named TOPS-10, but it was shipped with the PA1050 TOPS-10 Monitor Calls emulation facility which allowed most, but not all, TOPS-10 executables to run unchanged.
foaf:name
  • TOPS-20
developer
language
latest release version
  • 7.1
license
status
  • Discontinued
is operating system of
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