Unix is a family of operating systems derived from AT&T Unix in the 1970's. As such, it is the oldest and most stable operating systems available. Many current operating systems are derived from Unix, the most well known being [[https://en.wikipedia.org/wiki/Linux|Linux]] and [[https://en.wikipedia.org/wiki/OS_X|Apple OS X]].

[[http://dailydata.net|Daily Data]] has been working with the Unix operating system since the 1990's, mainly [[http://debian.org|Debian]] and various other Linux distributions, but also working with [[https://en.wikipedia.org/wiki/IBM_AIX|AIX]], [[https://en.wikipedia.org/wiki/HP-UX|HP-UX]] and [[https://en.wikipedia.org/wiki/Solaris_%28operating_system%29|Solaris]]

In this Knowledge Base, we cover the broad categories of 
  * [[unix:freeBSD:start|Free BSD]]
  * [[unix:Linux:start|Linux]]
  * [[unix:apple_osx:start|Apple OS-X]]

[[Microsoft Windows:]] is in a separate category since it is the only non-Unix platform we work on currently.