P
Parameter
A variable that is given a constant value for a speciîš´ed application and that might denote the
application.
p bit
Parity bit.
PC
Parity check.
PCC
Power
®
control compartment.
PDF
Portable Document Format.
PE
Parity error. Product engineer.
PFS
Perfect forward secrecy.
Pick
Pertaining to the library to remove, by using a robotic device, a tape cartridge from a storage slot or
drive.
Picker
A robotic mechanism that is located inside the library that moves cartridges between the cartridge
storage slots and the drive.
PM
Preventive maintenance.
POR
Power-on reset.
Port
A physical connection for communication between the 3590 and the host processor. The 3590 has 2
SCSI ports.
Portable Document Format (PDF)
A standard that is speciîš´ed by Adobe Systems, Incorporated, for the electronic distribution of
documents. PDF îš´les are compact, can be distributed globally (by way of email, the web, intranets,
or CD-ROM), and can be viewed with the Acrobat Reader. Acrobat Reader is software from Adobe
Systems that can be downloaded at no cost from the Adobe Systems home page.
Private key
A cryptographic key that is used to decrypt a message.
PROM
Programmable read only memory.
PS
Power supply.
PTF
Program temporary îš´x. A single bugîš´x or group of bugîš´xes that are distributed in a form ready to
install for customers.
PWR
Power.
R
Rack
A unit that houses the components of a storage subsystem, such as the library.
IBM Conîš´dential
Glossary279
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