2014-04-26 10:52:28 -04:00
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PDP-20
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2014-04-26 11:54:15 -04:00
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n. The most famous computer that never was. PDP-10 computers running the
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TOPS-10 operating system were labeled DECsystem-10 as a way of
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differentiating them from the PDP-11. Later on, those systems running
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TOPS-20 were labeled DECSYSTEM-20 (the block capitals being the result of a
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lawsuit brought against DEC by Singer, which once made a computer called
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system-10 ), but contrary to popular lore there was never a PDP-20 ; the
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only difference between a 10 and a 20 was the operating system and the color
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of the paint. Most (but not all) machines sold to run TOPS-10 were painted
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Basil Blue , whereas most TOPS-20 machines were painted Chinese Red (often
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mistakenly called orange).
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