Chris A. and Yong L.

Telnet- (Telecommunication network) is a network protocol used on the Internet and Local area network (LAN) connections. Developed in 1969, it provides access to command-line interface (DOS) on a remote machine. Since mid-2000s, Telnet clients are rarely still used, usually only to diagnose problems and manually "talk" to other services
(http://en.wikipedia.org/wiki/Telnet)

E-mail- Electronic mail- any method of creating, transmitting, or storing primarily text-based human communications within digital communications systems. In using their Compatible Time-sharing system (enabling multiple users to utilize processing power from one machine), MIT researchers developed e-mail in 1965 as a way for these users to communicate. This later became an essential application in the spread of DarpaNET's technology.
(http://en.wikipedia.org/wiki/E-mail)

the World Wide Web- system of interlinked hypertext documents accessed via the Internet. Through a Web browser, one can view Web pages that may contain text, images, videos, and other multimedia and navigate between them using hyperlinks. English scientist Tim Berners-Lee conceptualized the World Wide Web in 1989, proposed his ideas and later released them in 1992. Headed by Berners-Lee, the World Wide Web Consortium (main international standards organization for the World Wide Web) produces the majority of Web standards, such as recommendations for programming languages which define the structure of hypertext documents. The World Wide Web enabled the spread of information over the Internet through an easy-to-use and flexible format. It thus played an important role in popularising use of the Internet, to the extent that the World Wide Web has become a synonym for Internet, with the two being conflated in popular use.
(http://en.wikipedia.org/wiki/World_wide_web)

Blog- individual websites that can function as commentary on a particular subject or more personal online diaries. Typical blogs combine text, images, and also other links within the blogosphere (known as the collective community of all blogs). The modern blog evolved from the online diary, where people would keep a running account of their personal lives. In 1993, Dr. Glen Barry invented blogging, defined as web based commentary, linking to other articles. Early blogs were simply manually updated components of common Web sites. However, the evolution of tools to facilitate the production and maintenance of Web articles posted in reverse chronological order made the publishing process feasible to a much larger, less technical, population. Some popular blogging sites include: MySpace, Blogger.com, livejournal.com, xanga.com, also Open Diary (which innovated the concept of allowing the audience to provide a user comment).
(http://en.wikipedia.org/wiki/Blog)

ICQ- An instant messaging computer program first developed by Mirabilis, an Israeli company, the company was later acquired by Time Warner/AOL. Originally released in 1996, it was acquired by AOL in 1998- Today ICQ is used by over 31 million users worldwide. ICQ became the first Internet-wide instant messaging service. ICQ has been used as a basis for most popular instant messaging systems of today, including: iChat, Meebo, etc.
(http://en.wikipedia.org/wiki/Icq)