Top Definition
O's
ounces,particularly of crack
i cooked up ten o's last night.
Devon W.によって 2006年02月12日(日)

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OS
Operating system. Simply, a program that runs your computer. Examples of an operating system are CP/M, DOS, Windows, Mac OS, Linux, and Palm OS, though there are many more. One will oftentimes become overly attached to their OS, preaching it as though it were a religion and shunning all who use anything even slightly different.
Man: My OS of choice is Windows XP.
Woman: My OS of choice is Mac OS X.
Man & Woman: (killing eachother)
Supa-Nerd: My OS of choice is CP/M! 8086 FOREVAH!!!
Chowによって 2004年10月27日(水)

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OS
Abbreviation for Operating System

A good list of popular Operating Systems are listed here (taken from "www.bellevuelinux.org"):
AIX
Amiga
BeOS
Darwin
FreeBSD
FreeDOS
GNU/Hurd
HP-UX
IRIX
JavaOS
Linux
Mac OS X
Microsoft Windows
MINIX
MS-DOS
NetBSD
OpenBSD
Palm OS
QNX
SkyOS
Solaris
TRON
Tru64

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.
1: All the company's servers used Unix (OS), but now they use Linux (OS).

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.
Klienmahnによって 2007年11月08日(木)

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os
the opposite of so. when a conversation dies, instead of saying so, say os. it will jump the conversation to a new level to keep the flow.
...dead silence.

os.

What ? Os ?

Yeah the opposite of so,.....proceed from here
Will Hamiltonによって 2004年03月10日(水)

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abbreviation of "one's self" sometimes used in dictionaries
French dictionary:
s'occuper
- to occupy o.s.
- to keep o.s. busy
TomParysによって 2013年03月06日(水)

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O.S
Oral Sex
That bitch gave me O.S Last night
ACによって 2003年11月11日(火)

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os
An abbreviation for oh shit
"Os! Do you smell baby Sarah? I thought I changed her a few minutes ago."
"Os?"
"I don't wanna cuss in front of the child."
kpbostonianakamrsadamsによって 2009年06月22日(月)

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