
Many people credit Ken Thompson of AT&T with inventing the Unix oper
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ating system and, in a sense, they’re right. Thompson wrote the first Unix
version in 1969 at AT&T’s Research Division of Bell Laboratories in Murray
Hill, New Jersey. It ran on a Digital PDP-7 minicomputer as a platform for
the program Space Travel. Space Travel originally ran on the Multics system,
developed at the Massachusetts Institute of Technology.
Unix is based on Multics, one of the first timesharing operating systems.
Before the development of Multics, most computer operating systems oper
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ated in batch mode, forcing programmers to edit large stacks of punched cards
or