| A | B |
| hard drive | a special magnetic disk on which you can store computer data in the form of bits and bytes |
| modem | a device which allows computers to transmit data over telephone or cable lines |
| peripheral device | a device which is not a part of the main computer but which can be plugged into it, such as a printer, CD-ROM drive, external hard drive, flash memory stick |
| port | a special plug which connects a computer to a peripheral device |
| router | in a home, this is used to connect two or more computers to a modem so each computer can connect to the Internet |
| application | a program for computer users to use--like Word, Excel, Type to Learn, and other programs that people can use |
| document | a file produced by an application; it may contain words, graphics, and sound |
| file | a single collection of information with a name stored on a computer |
| folder | a place with a name in which you can store files on a computer |
| operating system | the most important program on a computer; it acts like a traffic cop making sure all the different things the computer is doing run smoothly |