Epson Progression U12 - Manual (Page 193)

Coprocessor
See Math coprocessor.
CPU
Central Processing Unit. The primary computer device that
interprets instructions, performs the tasks you indicate, keeps
track of stored data, and controls all input and output
operations. See also Microprocessor.
Cursor
The highlighted marker or pointer that shows the screen
position at which keystrokes will appear when typed or where
the next mouse command will be executed.
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.
See also Tracks.
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).
6 Glossary