HTML HyperText Markup Language is the markup language used to create Web pages. IMAP Internet Message Access Protocol is a protocol for accessing messages on your Internet host. With IMAP, you can choose whether to leave messages on your host or transfer them to your desktop computer. These two terms are relative. Examples are pine, elm, Berkeley mail, Pegasus Mail, and Eudora. mail transport agent or MTA Software that transports mail messages.
Examples are sendmail or smail.
In nn, this is when the list of authors and subjects of articles in a newsgroup are displayed. You choose the articles you're interested in by typing their IDs. A newsgroup that has a moderator, i.e., someone who looks at each article before it gets posted and decides whether it is appropriate. Examples are comp.viruses and bit.listserv.nettrain . The Net The Internet.