In 1969, a computer scientist at Bell Labs named Ken Thompson wrote an operating system for a Digital Equipment Corporation PDP-7 minicomputer that he initially dubbed Unics. This was later renamed UNIX and continued to be developed at Bell throughout the 1970s, with each numbered version corresponding to the current edition of the accompanying UNIX Programmer’s Manual. In fact, just a few days ago marked the 50th anniversary of UNIX Version 1, dated November 3, 1971.