Technical data

Glossary
The glossary defines some of the technical terms used in this manual.
backup copy
A copy of data stored on a disk.
backup process
The process of making copies of the data stored on a disk so that you can
recover that data after an accidental loss. You make backup copies on tape
cartridges or on another disk.
binary
A number system that uses two digits: 0 and 1. They are represented in
system circuitry by two voltage levels, and programs are executed in binary
form.
bit
A binary digit; the smallest unit of information in a binary system of notation,
designated as a 0 or a 1.
bus
A channel (a set of wires) along which communication signals in a computer
system travel.
byte
A group of 8 binary digits (bits). A byte is one-quarter of a VAX system
longword.
caddy
The holder for inserting a compact disc into a compact disc drive.
central processing unit
See CPU.
Glossary–1