AAP

Apollo Applications Program

AAPO

Apollo Applications Program Office

AES

Apollo Extension System

ALEM

Apollo Lunar Exploration Mission

AM

airlock module

ATM

Apollo telescope mount

BeV

Billion electron volts

BTU

British thermal unit

°C

degrees Celsius (centigrade)

cc

cubic centimeter(s)

CM

command module

cm

centimeter

CSM

command and service modules

cu m

cubic meter(s)

DOD

Department of Defense

EREP

Earth resources experiments package

ERTS

Earth Resources Technology Satellite

EVA

extravehicular activity

°F

degrees Fahrenheit

fps

foot (feet) per second

g

gram; gravity

gal

gallon

GSFC

Goddard Space Flight Center

HF

high frequency

hr, hrs

hour, hours

HSCC

Historical Services and Consultants Company

in

inch(es)

IU

instrument unit

JPL

Jet Propulsion Laboratory

JSC

Johnson Space Center

kg

kilogram(s)

km

kilometer(s)

KSC

Kennedy Space Center

LaRC

Langley Research Center

LC

Launch Complex

LEM

lunar excursion module

LM

lunar module

m

meter (s)

Me

megacycles

MDA

multiple docking adapter

MeV

million electron volts

MHz

megahertz (million cycles per second)

mi

mile(s)

min

minute(s)

mm

millimeter(s)

mo, mos

month, months

MOL

Manned Orbiting Laboratory

MORL

Manned Orbital Research Laboratory

mph

miles per hour

MSC

Manned Spacecraft Center (later JSC, Johnson Space Center)

MSFC

Marshall Space Flight Center

MW

megawatt(s)

NASA

National Aeronautics and Space Administration

nm

nautical mile(s)

OMSF

Office of Manned Space Flight

OSSA

Office of Space Sciences and Applications

OWS

Orbital Workshop

psf

pounds per square foot

psi

pounds per square inch

psia

pounds per square inch absolute

RF

radio frequency

sec

second(s)

SEB

Source Evaluation Board

SL

Skylab

SLA

spacecraft lunar module adapter

SM

service module

SSESM

spent stage experimental support module

V

volt(s)

VHF

very high frequency

W

watt(s)

wk

week

yd

yard

yr

year