"The Unix operating system was invented in the early 1970s at AT&T’s Bell Laboratories in New Jersey. In the late ’70s, Unix zealots from Bell Labs visited the Berkeley campus, and a new, richer version of Unix was developed. Along with hot tubs, leftist politics, and the free speech movement, Berkeley is known for its Unix implementation.A schism developed between advocates of the small, compact AT&T Unix and the more elaborate Berkeley implementation. Despite conferences, standards, and promises, no consensus has appeared, and the world is left with two competing Unix operating systems.Of course, our lab used Berkeley Unix, as do all right-thinking folks. East Coast people were said to be biased towards AT&T Unix, but then, they hadn’t discovered hot tubs either."