IBM SY44-5902-05 manual SCS. See SNA character string

POR. Power on reset.

port. System hardware where the input/output devices are attached.

POSIX. Portable operating system interface for computer environments.

problem analysis. The process of finding the cause of a problem.

problem isolation procedure. Written information used by service representatives to repair IBM equipment. A PIP contains questions and procedures that direct the user to the failing part of the equipment.

protocol. A set of rules that controls the communication and transfer of data between two or more devices (or systems) in a communications network.

PSP. Preventive service planning.

PTF. Program temporary fix. A temporary solution to, or bypass of, a defect in a licensed program.

PWI. In data communications, power indicate.

RAM. Random access memory.

RAS. Reliability, availability, serviceability.

RC-GND.In data communications, receive circuit ground.

RCLK. In data communications, receive clock.

RD. (1) In data communications, received data. (2) Remove Directory (RD).

replace. To exchange; for example, to exchange one part with another.

restore. To return to an original value or image; for example, to restore data to main storage from auxiliary storage.

RGND. In data communications, return ground.

RI. In data communications, ring indicate.

RISC. Reduced instruction set computer.

RLB. In data communications, remote loop back.

RLSD. In data communications, received line signal (carrier) detector. See also CD.

ROS. Read only storage.

RPQ. Request for price quotation

RSET A, B. In data communications, receiver signal element timing (A and B refer to each individual signal of a differential pair of signals).

RTS. (1) In data communications, ready to send. (2) Reliable transfer server.

SAG. Shared access group.

save media. Recorded and saved system data that is generated by the save command.

SC-GND.In data communications, send circuit ground.

SCPF. Start-control-program-function job.

SCS. See SNA character string.

SCSI. Small computer system interface.

SDLC. Synchronous Data Link Control

SGND. In data communications, signal ground.

shadow log. A portion of the product activity log that is maintained by Licensed Internal Code.

SID. (1) Segment ID. (2) Subject identifier.

sign on. The procedure by which the user starts a terminal session.

SLID. Error log ID (for error log entries).

SNA. See Systems Network Architecture.

SOM. System object model.

SP. Service processor.

SPCN. System power control network. An asynchronous serial communications network. SPCN connects the power system in participating components to the operating system and can report critical changes and power failures in those components to the operating system. SPCN gives the operating system control of electrical power.

SRC. See system reference code.

SSB. In data communications, select standby.

SST. System service tool.

STBY. In data communications, stand by.

storage management recovery. A function that prepares the system to access data from all disk units configured to the system.

subfunction. A set of functions that are contained in a specific control panel function.

subset. A set of elements that are part of a specified set.

Glossary of Terms and Abbreviations 329