1. Internet- International network of computers that you connect to be telephone line or other means.Two popular services of the Internet are world wide web and electronic mail.

2. Virus- A small, unauthorized program that can damage a PC.

3. Bug-  A (small) defect or fault in a program.

4. Font- A particular sort of lettering (on the screen or on paper. Arial is a font. Times New Roman is another.)

5. Bit, Bytes- A bit is the smallest piece of information that computers use. For simplicity, a PC uses bits in a group of 8 called bytes.

6. Electronic Mail- Messages sent from one computer to another.

7. World Wide Web, WWW, The Web-  Initials that stand for World Wide Web. The Web is one of the services available on the Internet. It lets you access millions through a system of links. Because it is "world-wide", it was originally called the World Wide Web or WWW.

8. CPU- Central Proccessing Unit. This is a PC's heart or brain.

9. CD-ROM- A disk for storing computer information. It looks like an audio CD.

10. Anti-Virus Software- A program that finds and removes viruses from a computer.