A fun article here:
50 Places you wouldn't expect uses Linux
Also historically Unix/Linux has had a better uptime/less crashes then Windows severs or OS's.
We use Unix AIX at work and i run Linux Mint at home.
Unix/Linux is harder to learn and use then Windows, but for someone trained to customize them you will find you can do soo much more and have a lot more freedom & reliability. 83% of
According to www.forbes.com & www.linux.com 94% of Supercomputers run Linux/Unix.
Also the gaming industry recently opened up to Linux. Steam gaming client is now in linux, Blizzard announced they are making their first Linux game, and i'ts flooding quickly due to all the free software alternatives you can get.
Majority of Movie studio equipment in the US is also ran on linux machines due to it being supperior for modeling jobs over even MAC's.
Linux is based off of old Unix Style Technnology now it's developed so much it's really it's own monster, but MAC was also developed off Unix Ideas so Applications that are MAC comparable are easily Linux with some adjustments.
Linux has gotten so easy to use that i do everything from Javascripting & 3D modelling, to running our own
tomcat sever, to playing DeadSpace 3 & Team Fortress 2.