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POST
Power-on self test.
power cycle
To remove power from, then restore power to an electrified device.
power-on self test (POST)
A series of diagnostic tests that run automatically when a device is powered ON.
PROC
Shortened term for the Procedures section of this or other Maintenance Information.
PROM
Programmable read-only memory.
PS
Power supply.
PSJ card
Power supply card.
pSystem
Deprecated IBM term for AIX or RS/6000 (System p) products, which were formerly known as pSeries
products.
PTF
Program temporary fix.
PVPD
Privileged vital product data.
The data that is contained within the tape drive that requires special passwords to access.
PWR
Power.
R
RAM
Random access memory.
random access memory
A storage device into which data is entered and from which data is retrieved in a nonsequential
manner.
RAS
Reliability, availability, and serviceability.
Abbreviated term for product design characteristics.
record
A collection of related data or words, which are treated as a unit.
recording density
The number of bits in a single linear track measured per unit of length of the recording medium.
recoverable error
An error condition that allows continued execution of a program.
ref
Reference
reg
Register
reinventory
To inventory again.
retension
The process or function of tightening the tape onto a cartridge spool, if it is sensed that the tape has a
loose wrap on a spool.
RID tag label
Repair identification tag label.
Glossary 313
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