The Unix operating system is one of computing's most significant technologies, providing the framework that the familiar Linux and Mac OS X operating systems were developed on.

But my gut feel for this is that Unix is indeed the world's most successful operating system ever. 900 million concurrent users? I don't think even Windows has managed that.

If you're new to the UNIX operating system, especially if you're familiar with Windows, you'll find that the file access control mechanisms might not be exactly what you expect.

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 ...

In the wee hours Sunday morning, Greenwich Mean Time, the Unix operating system will have counted its billionth second from the moment Unix computers recognize zero-time. By Farhad Manjoo.

Security experts have uncovered a new class of vulnerabilities in Unix and Linux systems that let attackers take full control of computers.

What led Novell to sell Unix licensing rights to SCO? Plus, some of SCO's propriety claims are "foolish," "absurd," and "indsidious." The world needs open source.