p. 17
Item
Description
Explanation
PSU
Power Supply
Unit
An assembly used to create or convert electrical power
PS/2
Personal
System/2
A 6-pin Min-DIN connector used for keyboard and mice
PTT
Press to
Transmit
Usually a button or switch related to the communication system.
PW
Pratt and
Whitney
Engine Manufacturer
PWR
Power
Used as a label
1.2.16
Q
Item
Description
Explanation
QTG
Qualification
Test Guide
Acceptance Testing Document
1.2.17
R
Item
Description
Explanation
RA
Resolution
Advisory
TCAS Warning
RACE
Retargeted
Avionics
Computing
Element
A proprietary processor board
RAID
Redundant
Arrays of
Independent
Disks
A data storage and backup system
RAM
Random Access
Memory
A type of computer memory that can be accessed from time to
time, that is, any byte of memory can be accessed. There are
two basic types of RAM - Dynamic RAM (DRAM) and Static
RAM (SRAM)
RCS
Revision Control
System
The Revision Control System (RCS) manages multiple revision
of files. RCS automates the storing retrieval, logging,
identification, and merging of revisions.
RGB
Red Green Blue
A signal standard for video
RJ-45
Registered Jack-
45
An 8-wire modular connector used as a connector on the
ethernet network