• Internet- the Internet is a network of computer networks. The users can share resources and communicate with each other all over the world. The Internet is also called a meta network.
• The Client/Server Model- The most popular Internet tools operate as client/server systems. You're running a program called a Web client. This piece of software displays documents for you and carries out your requests. The Web server is a computer running another type of Web software which provides data, or "serves up" an information resource to your Web client.
• Electronic mail- E-mail is a fast and efficient way to communicate with friends or colleagues. You can communicate with one person at a time or thousands; you can receive and send files and other information.
• Network news (Usenet News)- is a service comprised of several thousand electronic discussions providing users an effective way to share information with others on just about any topic.
• Freeware- When you download freeware software, the author continues to carry the copyright to the software, but permits you to use the program for free. You can share freeware with others, as long as you don't sell it.
• Public Domain- When you download public domain software, you can use it freely. The creator carries no copyright, and has released it for anyone to use. There are no limits on distribution or sale and anyone can modify the program.
• Shareware- When you download shareware, the author continues to carry the copyright to the software, but you're permitted short-term use of the program for evaluation purposes. At the end of evaluation period, you must either pay the copyright holder for the program or destroy all copies you've made of it.
• Uniform Resource Locators (URL)- A URL is the address of a document you will find on the world wide web (WWW). Your WWW browser interprets the information in the URL in order to connect to the proper Internet server and to retrieve your desired document.