| A | B |
|---|
| Snail Mail | Slang term for the standard postal service. |
| IP Address | A unique numerical address assigned to a computer or network device on a network. |
| Message Transfer Agent (MTA) | A messaging component that routes, delivers and recieves e-mail. |
| Mail Delivery Agent (MDA) | An e-mail server program that receives sent messages and delivers them to their proper destination mailbox. |
| User Name | A unique name or number that identifies you when logging on to a computer system or online service. |
| Domain Name | An IP address represented in words. |
| E-mail Client | An e-mail program that is independent of any specific Web browser, and that you can use to send e-mail messages. |
| Mail User Agent (MAU) | A messaging component used as a stand alone application by the user. |
| Browser E-mail | E-mail programs such as Netscape Mail & Newsgroups or Outlook Express that comes bundled with a Web browser and which they may be integrated. |
| Online Service E-mail | An e-mail program that is part of an online service's software. |
| Web-Based E-mail | Free e-mail service from a provider such as Hotmail or Yahoo! in which you request a username. |
| Multipurpose Internet Mail Extensions | A protocol that enables operating systems to map file extensions to corresponding applications. |
| Header | A block of information attached to a piece of data. The first part of a network packet. |
| Secure Mime (S/MIME) | Secure version of MIME that adds encryption to MIME data. |
| Pretty Good Privacy (PGP) | A method if encrypting and decrypting e-mail messages. It can also be used to encrypt a digital signature. |
| GNU Privacy Guard (GPG) | An open-source version of PGP, used for encrypting and decrypting e-mail messages, that does not use patented algorithms. |
| Attachment | A file that is sent with an e-mail message. |
| Emoticon | A combination of characters that you read sideways that helps convey emotion in an e-mail message. |
| Spam | Unsolicited and unwanted e-mail messages; the online version of junk mail. |
| Completely Automated Public Turing Test to Tell Computers and Humans Apart (CAPTCHA) | A test that uses a word-verification graphic designed to differentiate humans from automated senders during online transactions. |
| Blackhole List | A published list of IP addresses known to be sources of Spam. |
| Spam Filter | An e-mail client program that identifies and filters out spam messages before they reach the e-mail inbox. |
| Personalized Information Management (PIM) Program | A tool used to schedule appointments and meetings, store contact information, and manage tasks. |
| Personal Data Assistant (PDA) | A small, handheld computer used for personal information management. |
| Wireless Application Protocol (WAP) | A standard protocol that wireless devices use to access the Internet. |
| Wireless Markup Language (WML) | A markup language that presents the text portions of web pages to wireless devices. |
| Small Screen Rendering (SSR) | A browser technology developed for wireless devices that reformats Web pages to display on 176-pixel-wide cellular phone display screens. |
