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.”