In 1969, Ken Thompson of AT&T Bell Labs was looking for a computer to create what, eventually, became the fi rst Unix system. He found an unused PDP-7 minicomputer, which he was able to use. Suppose...

In 1969, Ken Thompson of AT&T Bell Labs was looking for a computer to create what, eventually, became the fi rst Unix system. He found an unused PDP-7 minicomputer, which he was able to use. Suppose Thompson had not found the PDP-7. Would we have Unix today?