| A | B |
| simulation | Models a real-world activity. |
| software piracy | Illegal copying and using software |
| spider | A search engine robot that searches the Internet for the keywords |
| subject directories | A method for searching for information on the WWW |
| time bomb | Computer virus that does not cause its damage until a certain date or until the system has been booted a certain number of times |
| trojan horse | Computer virus that does something different from what it is expected to do. It may look like it is doing one thing while in actuality it is doing something quite opposite (usually something disastrous). |
| toolbar | An area on the screen where icons (little pictures) of commonly used commands are displayed |
| URL | Universal Resource Locator. Also known as the web site address |
| Usenet | A worldwide network of computers that facilitates the transmission of messages among the news servers |
| Virtual reality | An artificial environment that appears to feel like a real environment |
| WebQuest | A type of activity that uses the Internet for investigation and problem solving |
| Web server | Displays Web pages and renders them into final form so that they can be viewed by anyone with an Internet connection and a Web browser |
| wildcard character | The * symbol or asterisk is considered a wildcard character. If you don’t know the spelling of a word or you want to search plurals or variations of a word, use the wildcard character. |
| World Wide Web | A subset or an application that makes use of the Internet. The Internet can exist without the Web, but the Web cannot exist without the Internet. |
| Worm | A type of computer virus that makes many copies of itself resulting in the consumption of system resources which slows down or actually halt tasks. |