On "1-2-3-4-5-6-7-8-9-0 Day," tech lovers all over the world celebrated the moment when the clocks in the popular Unix computer operating system struck that exact stream of numbers. But on Feb. 13, ...

I booted UNIX V4 (first C rewrite) in a PDP‑11 emulator. It feels tactile—no backspace, staggered print, slower typing, and ...

Forty years ago this summer, a programmer sat down and knocked out in one month what would become one of the most important pieces of software ever created. In August 1969, Ken Thompson, a programmer ...

What defines an operating system isn’t a geeky label or a collection of ramblings from the mouths of its community members. Nor is it some empty and pointless certification offered up by an obscure ...

Researchers found the only known surviving copy of Unix Version 4 on magnetic tape, a key milestone in the evolution of modern operating systems.