Current directory

The directory where MS-DOS executes your next command, unless you tell it to do otherwise (by including a pathname with the command). Also known as the default or working directory.

Current drive

The disk drive from which MS-DOS executes your next command, unless you tell it to do otherwise (by including a drive designator with the command). Also known as the default drive.

Cursor

The highlighted marker that shows your position on the screen.

Cylinders

The vertical alignment of tracks in a hard disk that can be lined up under one read/write head. The number of tracks on a disk is equal to the number of cylinders times the number of heads.

Data

Information such as text or graphics stored or processed by a computer.

Data diskette

A formatted diskette on which you store data files (as opposed to program files).

Default

Any value or setting that takes effect when the computer is turned on or reset. A default value stays in effect unless you override it temporarily by changing a setting or you reset the default value itself.