| A |
|
| AGC |
Apollo Guidance Computer |
| AGS |
Abort Guidance and Navigation
System (LM backup guidance system) (pron. 'ags') |
| B |
|
| Bank |
A 1024-word fixed (core-rope)
or 256-word erasable memory area |
| Block |
A 256-word erasable memory area (aka
E-Bank) |
| C |
|
| CM |
Command Module |
| CMC |
Command Module Computer |
| Colossus |
CMC software |
| Core rope |
'Woven' wire-and-core permanent
storage for AGC programs (original versions looked like rope) |
| CSM |
Command and Service Modules |
| D |
|
| DAP |
Digital Autopilot |
| E |
|
| E-Bank |
256-word erasable memory area |
| G |
|
| GNCS |
Guidance, Navigation and Control
System |
| GSOP |
Guidance System Operations Plan |
| L |
|
| LCG |
LM Guidance Computer |
| LEM |
Lunar Excursion Module (original term for LM) |
| LM |
Lunar Module (aka LEM) |
| Luminary |
LM software |
| O |
|
| Octal |
Base 8 number system used
throughout AGC software (e.g. 1018=6510) |
| One's
complement |
Number storage system used for
most AGC purposes - uses sign bit plus (in AGC) 14 magnitude bits, so has
different representations for +zero and -zero (cf
Two's Complement) |
| P |
|
| PGNCS |
Primary Guidance, Navigation
and Control System (main LM guidance system) (pron. 'pings') |
| R |
|
| Rope |
(see core
rope) |
| RCS |
Reaction Control System (small
manoeuvring jets) |
| S |
|
| SCB |
Apollo Spacecraft Software
Configuration Control Board |
| SM |
Service Module |
| Sunrise |
Early versions of AGC software
(see here
for details) |
| T |
|
| Two's
complement |
Number storage system used for
certain AGC counters - has only one zero (cf
One's Complement) |
| W |
|
| Word |
In AGC, 16-bit unit of storage
(includes 1 parity bit, so 15 bits available for data) |
| Y |
|
| YUL |
AGC cross-assembler (named because
early version was created near Christmas!) |
