IT Career Glossary
Glossary of key IT terms and acronyms used on this site.
Linux is an open-source (free to use) version of the UNIX operating system, and one of the most prominent examples of open-source software. Many businesses and government agencies run the Linux OS; one reason organizations choose Linux is because it is typically far less expensive than buying licenses for Windows or Mac OS.
A LAN (or local area network) is a network connecting computers in a small area, typically an office or building.