@

on UNIX system, used as a character between the username and the hostname.
Pronounced like 'at'.

say you're logged in at 'burrito' and your username is 'polemon', your (bash-)terminal would show:

polemon@burrito ~$

if root logs on, he would be 'root@burrito'

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SFLA

Acronym for: Stupid Four Letter Acronym
Often used in IRC.

stop using so many SFLAs

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