DEC 4000 Model 200 Operation Manual page 125

Glossary
Allocation class
The allocation class is used by the VMS operating system to derive a
common lock resource name for multiple access paths to the same device.
Application program
A program designed to meet specific user needs, such as a program that
monitors a manufacturing process.
Backplane
1. The connector block that printed circuit boards plug into.
2. A printed circuit board containing the bus.
Backup
The process of making copies of the data stored in the ISE(s) so that you
can recover that data after an accidental loss. You make these copies on a
tape cartridge and then store it in a safe place.
Backup copy
A duplicate copy of data on the ISE that is stored on a tape cartridge.
Baud rate
The speed at which signals are transmitted serially over a communication
line.
Binary
A number system that uses only two digits: 0 and 1. These digits are
usually represented in circuitry by two voltage levels.
Bit
A binary digit, the smallest unit of information in a binary system of
notation, designated as a 0 or a 1.
Boot
To use a bootstrap program to start a computer system.
Glossary–1