Scientific Data Systems

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Scientific Data Systems was an early manufacturer of small mainframes, mostly for scientific/engineering work. They enjoyed some success with the 24-bit 930 and 940, running modest time-sharing systems (many descended from the Berkeley Timesharing System).

Their 32-bit Sigma 7 is notorious for being the first ARPANET host.

They were sold to Xerox and renamed Xerox Data Systems (XDS); Xerox was unable to make a success of the computer business, and XDS was shut down (at a huge loss).

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