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POP

(1) (Point of Presence) The point at which a line from a long distance carrier (IXC) connects to the line of the local telephone company or to the user if the local company is not involved. For dial-up access to the Internet via analog modem, the POP is the local telephone exchange that the modem dials into to log in. See Super POP.

(2) (Post Office Protocol) See POP3.

(3) Retrieve an item from a stack. See push/pop.

(4) (Package for Online Programming) See POP-1.

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POP

1. Internet post office protocol: a protocol which brings e-mail to and from a mail server

2. Environment persistent organic pollutant

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1.	(language)	POP - A family of programming languages, POP-1, POP-2, POP-10, Pop-11, POP++, POP-9X, POPLOG.
2.		POP - Post Office Protocol. See also pop, PoP.
3.		PoP - Point Of Presence
4.	(programming)	pop - To remove something from the top of a stack. Opposite of push. (Not to be confused with Post Office Protocol or POP-1 the language).