browser
A client program that initiates requests to a web server and displays the information that the
server returns.
buffer
A routine or storage that is used to compensate for a difference in rate of flow of data or time of
occurrence of events, when data is transferred from one device to another.
bus A facility for transferring data between several devices that are located between two end points,
only one device able to transmit at a specified moment.
byte A string that consists of some bits (usually 8) that are treated as a unit and represent a character.
A fundamental data unit.
C
CA Certificate Authority.
CA certification
In cryptography, a certificate from a certificate authority (CA).
capacity
The amount of data that can be contained on storage media and expressed in bytes of data.
cartridge manual rewind tool
A device that can be fitted into the reel of a cartridge and used to rewind tape into or out of the
cartridge.
cartridge memory (CM)
Within each data cartridge, an embedded electronics and interface module that can store and
retrieve a cartridge's historical usage and other information.
cartridge storage slot
Individual slot that is located within a magazine that is used to house tape cartridges.
caution (notice)
A word to call attention to possible personal harm to people. Contrast with attention and danger.
CD Compact Disc. A disc, usually 4.75 inches in diameter, from which data is read optically by using
a laser.
CE Customer engineer; field engineer; service representative.
centimeter (cm)
One one-hundredth of a meter (0.01 m). Approximately 0.39 inch.
channel command
An instruction that directs a data channel, control unit, or device to perform an operation or set
of operations.
char Character.
CHK Check.
cleaning cartridge
A tape cartridge that is used to clean the heads of a tape drive. Contrast with data cartridge.
CM Cartridge Memory. Within each data cartridge, an embedded electronics and interface module
that can store and retrieve a cartridge's historical usage and other information.
COD Capacity On Demand.
command
A control signal that initiates an action or the start of a sequence of actions.
Glossary 335
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