Internet developed so rapidly that today it offers numerous services. The generalization of the World Wide Web (WWW) [1] as a point of access to this net has resulted in the confusion of this term. Many new users enter the world of Internet directly by WWW also known simply as the Web.

Nevertheless, there are a group of services called basic or classic, which are the base of Internet's functionality. These are electronic mail, file transfer and remote sessions or connections, all of which can be accessed through WWW but can also be used independently. A group of tools designed to search for information such as Archie, Gopher-Veronica and WAIS, tend to be presented as part of the Web. Because of their own peculiarities, it is important to know them and to appreciate what can be obtained by using them.

Technically, reference is being made to SMTP (Simple Mail Transmission Protocol) - the electronic mail protocol; TELNET (Network Emulation Terminal Protocol) - allowing the employment of PC from a remote location; and FTP (File Transfer Protocol) - permitting file transfer throughout the net.

From the very beginning these formed Internet's main services and are responsible for making its contribution relevant and, despite the development of new tools, these still continue to be principal features. Today's great advantage is that their integration is increasingly transparent thanks to the World Wide Web. Those who primarily visualized World Wide Web as Netscape or Internet Explorer have already included electronic messaging and FTP services as part of their packages.

It is very important to understand that the Web's first goal was to offer a unifying and integrated access to hypermedia documents from any given point in the Internet. Thus, and thanks to NSCA Mosaic[2] which captured its essence, the trend has been to access all of the Internet services from this window.

This window also allows users to reach the services mentioned before. (Anatomy of the World-Wide Web / by Eric Richard. -- Internet world 6(4): 28, April 1995).