MPE/iX Glossary of Terms and Acronyms (32650-90887)

48 Chapter1
Glossary of Terms
OPERATOR.SYS The user and account that MPE/iX automatically logs on to at the
console when the system is started. OPERATOR.SYS may or may not be
assigned special capabilities. Unlike the system supervisor (who is
assigned OP capability), or the system manager (who is assigned SM
capability), there is no mnemonic that entitles the operator to execute a
special subset of commands. The operator's power and responsibilities
derive solely from control of the system console and any capabilities
assigned to it by the account manager of the SYS account.
optimizing compiler A sophisticated compiler that intelligently translates high-level
language programs to object code by removing inefficiencies and
unnecessary instructions. With an optimizing compiler, a program
generally runs faster and uses less memory.
optional parameter A parameter that is not required when entering a command or
calling an intrinsic. In reference manuals, optional parameters are
surrounded by square brackets ([ ]).
original equipment manufacturer (OEM) A manufacturer of equipment that may be
marketed by another manufacturer.
outclass priority A value in the range of 1 to 13 used to determine if a job's error listing
prints. If the outclass priority is higher than the system outfence, the error
listing will print.
outfence The system outfence is a number in the range of 1 (lowest priority) to 14
(highest priority), used to control access to the system printer. If a job does
not have an output priority higher than the system outfence (default 7), it
does not print.
output Data transferred from internal to secondary (external) storage in a
computer. Also, the process of transferring information from the computer
to a peripheral device.
output priority A number in the range of 1 (lowest priority) to 13 (highest priority)
assigned to an output spoolfile either by the system (a default value) or by
a user. If the output priority is higher than the system outfence, the job's
output prints.
overflow To exceed the capacity of a register or buffer's storage space. When an
overflow occurs, the excess data is lost.
overwrite To replace a disk file. If a file is saved under a name that already exists on
a disk, the new file overwrites the old file.
owner In ALLBASE/SQL the user ID, group, or class name that owns a table,
view, module, or group.
pack A set of one or more disk platters stacked inside a plastic cylindrical
container. A pack is usually called a disk pack. A disk pack stores data.
packet A unit of information passed between Levels II and III (data link layer and
network layer) of the Open Systems Interconnection (OSI) model.
packet assembler/disassembler (PAD) A device that converts asynchronous character
streams into packets that can be transmitted over a packet-switching