| A | B |
| file format | standards used to save data on a disk. |
| boot | turn the computer on. |
| power on self test | as a computer boots, it performs a series of test. |
| window | rectangular, on-screen frames that can be opened, closed, resized, or rearranged to view programs. |
| pulldown menu | list of commands when you select an item from the menu. |
| ribbon | a series of tabs at the top of the window. |
| pop up menu | lists of shortcut commands that appear when an area of the screen is clicked or right clicked. |
| screen saver | a utility program that changes the screen display after a preset period of nonuse. |
| file extension | two or three letter, following a period, that indicates in which application the file was created and the file format it uses. |
| cross platform compatibility | sharing files across operating systems. |
| corrupted | damaged to the point at which data is unrecoverable. |
| disk scanner | a utility which checks magnetic disks for errors, can fix this problem. |
| file fragmentation | occurs when a file is broken into pieces that are saved in different places on a floppy disk or hard drive. |