| A | B |
| Dialog box | A small window with options for completing an action |
| E-mail | The sending and receiving of electronic messages and computer files over a communications network such as a LAN or the Internet |
| Extension | Indicates the file type and is used by the application to recognize files that it can work with |
| Identity theft | A crime that seeks to obtain confidential information in order to rob an unsuspecting individual of his or her identity |
| Opening a file | Transferring a copy of the file contents to the computer’s memory, which displays it in a window |
| Overwrite | The process of replacing an existing file with one that contains changes |
| Phishing | An e-mail security threat involving online fraud and identity theft |
| Search criteria | The words or phrases used in a search |
| Search engine | Used to locate information on the Web |
| Spam | Junk e-mail |
| Status bar | Displays information about a document |
| Taskbar | A Windows operating system feature that displays buttons for each open file or application |
| Title bar | A horizontal bar that displays the name and type of document |
| Trojan horse | Malicious code that appears like a useful program |
| Virus | Malicious code attached to a program that may come as an e-mail attachment |
| Worm | Malicious code that can replicate itself, use up a system’s memory, and bring down a system |