NonStop System Glossary

COUP
See Configuration Utility Program (COUP).
CPU
See central processing unit (CPU).
cpu, pin
In the Guardian environment, a number pair that uniquely identifies a process during the lifetime
of the process, consisting of the processor (CPU) number and the process identification number
(PIN). See also PID.
creation version serial number (CRVSN)
In the Open System Services (OSS) environment, a number assigned by a disk process when a
file is created. The CRVSN is used by the disk process and the OSS name server process to verify
that the correct file is accessed. The CRVSN is stored in the catalog entry for an OSS regular file
and is passed to the disk process when a Data Definition Language (DDL) request that involves the
file is made.
CRC
See cyclic redundancy check (CRC).
critical load
Equipment that must have an uninterruptible power input to prevent damage to the equipment or
the facility or prevent injury to personnel.
CRPC
See computer-room power center (CRPC).
CRU
See customer-replaceable unit (CRU).
CRVSN
See creation version serial number (CRVSN).
CSQ
See conformance statement questionnaire (CSQ).
current
The flow of electrons in a conductor.
current configuration file
See configuration file.
current working directory
In the Open System Services (OSS) environment, the directory used in pathname resolution of
relative pathnames. A process always has a current working directory. See also working directory.
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