Term used by gamers to "Lay flat on stomach and 'crawl'" - Used in First Person shooter games such as the new "Farcry" (Prone Key 'V').
Effective sniper shots are taken in the 'prone' position.
To achieve higher accuracy, you should PRONE before you shoot.
A programming (systems analyst) term for !. Also known as "NOT"
Bang your check of the user logon instead, it'll be easier that way...