DEC 4000 Model 200 Operation Manual page 126

Bootable medium
A fixed disk or magnetic tape containing software (such as an operating
system) that the bootstrap program can load into the system memory.
Boot node
The management center for the cluster and its major resource provider.
Bootstrap
A program that you start when you turn on the system. The bootstrap loads
software contained on a fixed disk or magnetic tape cartridge into memory.
The system then stops executing the bootstrap and starts executing the
software in memory. The software usually loads an operating system or
other software into memory, so that the system can start processing.
Bug
An error in the design or implementation of hardware or software system
components.
Bus
The connection between the central processing unit (CPU) and input/output
devices in the system. Information signals such as address, data, and
control signals are carried through the bus.
Byte
A group of eight binary digits (bits). A byte is one-half the size of a word
and one-quarter the size of a longword.
Central processing unit (CPU)
The part of a computer system that controls the interpretation and
execution of instructions.
Cluster
A group of computers networked together that share disk storage,
application programs, and other computer resources. Also called a
VAXcluster.
Command
An order given by a user to a computer, often through a terminal keyboard.
Communication line
A cable along which electrical signals are transmitted. Systems or devices
connected by communication lines can share information and resources.
Glossary–2