  CNET GLOSSARY: Terms for the techie
POP3
Post Office Protocol 3 A common standard for accessing e-mail on the Internet. With POP3, you connect to a server and download all of your messages, which are then deleted from the server. A problem with this method is that you must download messages to read them; this can be inconvenient if some of the messages contain graphics or video and are therefore very large. The newer IMAP standard lets you view messages on the server. 
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