DEC MicroVAX 3100 Owner's Manual page 174

cartridge insert/release lever
This lever sets internal TZ30 mechanisms to accept or eject the tape car-
tridge. Move the lever to the left to insert a tape, move to the right so the
tape can be used, and move to the left again to eject the cartridge after the
tape has been completely rewound.
cartridge leader
A plastic leader at the beginning of magnetic tape.
central processing unit (CPU)
The part of the system that controls the interpretation and execution of
instructions.
cluster
A group of computers networked together that share disk storage, applica-
tion programs, and other computer resources. Also called a VAXcluster.
coaxial cable
A 2-conductor, concentric, constant impedance transmission cable.
communications line
A cable along which electrical signals are transmitted. Devices or systems
that are connected by a communications line can share information and
resources.
computer system
A combination of system hardware, software, and external devices that
performs operations and tasks.
console mode
The state in which the computer is controlled from the console terminal.
Your system can be put in console mode by pressing the halt button on the
rear panel of the system unit. Console mode is indicated by the console
prompt
(»»
on the monitor screen. (Compare to program mode.)
console prompt
A prompt used for communication between the system manager and the
computer.
controller
A system component, usually a printed circuit board, that regulates the
operation of one or more peripheral devices.
Glossary-3