DEC 4000 Model 200 Operation Manual page 127

Computer system
A combination of computer hardware, software, and external devices that
performs specific operations or tasks.
Console terminal
The terminal you use when installing software and running diagnostic
programs.
Controller
A component that regulates the operation of one or more peripheral devices.
Controllers are often called interface units.
CPU
See Central processing unit.
DAT
Digital audio tape. Used in digital data storage recording technology.
Data
A representation of facts, concepts, or instructions, suitable for
communication, interpretation, or processing by human beings or by
machines.
Data transmission
The movement of data, in the form of electrical signals, along a
communication line.
DDS
Digital data storage.
Debug
To detect, locate, and correct errors (bugs) in system hardware or software.
DECnet
Digital networking software that runs on nodes in both local and wide area
networks.
DECwindows
Digital's workstation management product, a superset of the industry
standard X Window System. It can be used to run windowing applications
efficiently on single workstations, or in distributed processing networks of
workstations and non-workstations systems.
Glossary–3