Woman: My OS of choice is Mac OS X.
Man & Woman: (killing eachother)
Supa-Nerd: My OS of choice is CP/M! 8086 FOREVAH!!!
A good list of popular Operating Systems are listed here (taken from "www.bellevuelinux.org"):
Mac OS X
An operating system is the main software that runs a computer, without an operating system a computer is almost useless.
There is no best operating system, they all have their advantages/disadvantages and were all developed with some kind of goal in mind.
2: George had a quadruple boot with multiple OSs running on his PC, it ran Microsoft Windows Vista Ultimate, Mac OS X Leopard, and two flavors of Linux.