Meaning – The term pop, refers to the act of removing an item from the top of a pushdown list.

The term pop may also refer to the post office protocol, which is a type of computer networking and Internet standard protocol that extracts and retrieves email from a remote mail server for access by the host machine.

POP is an application layer protocol in the OSI model that provides end-users the ability to fetch and receive email.

Post Office Protocol is the primary protocol behind email communication. POP works through a supporting email software client that integrates POP for connecting to the remote email server and downloading email messages to the recipient’s computer machine.

Example of usage“As of 2012, Post Office Protocol is in its third version known as POP 3 and is commonly used in most email client/server communication architecture.”