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PGP

(Pretty Good Privacy) -- A commonly used encryption system, invented by Phillip Zimmerman. PGP is based on public key encryption. PGP allows to transmit Email or files securely and allows only the recipient who has the correct password to unlock the information.

PHP

A programming language. The PHP scripts, or commands, which are embedded in the web page`s HTML, are executed on the web server to generate dynamic HTML pages (e.g. search results from a database). See php.net.

POP

(Post Office Protocol) -- A protocol for delivering Email to personal computers. The current version is called POP3.

Messages are stored on a central Email server. Users can log on with an Email client and download their messages. All pending messages and attachments are downloaded at the same time. POP3 uses the SMTP messaging protocol.

POP differs from IMAP (Internet Mail Access Protocol) in that it doesn't allow users to store messages on the server and manipulate them from their Email client. With POP, messages are downloaded and manipulated on a local computer.

Propagation

The process by the name servers throughout the world have updated their records for a specific domain name. For example, if you move your domain name from one host to another, it will take around 24 to 48 hours for the new IP address to be seen by everywhere on the Internet. During that period, the traffic is decreasing at the old location and increasing at the new location.