Milspec Communication | Two-Letter Military Equpiment Code Guide

The following chart describes the various two-letter military equipment designation codes as used on various military equipment. The chart only breaks down the 'designation' portion of the code (group identifier). The second group of the code (or model number for purposes of this description) is irrelevant as it is specific to a particular piece of equipment.

Use the example bellow as a guide.

AB	Support, antennae
AM	Amplifiers
AS	Antennae (simple and complex)
BA	Battery, primary type
BB	Battery, secondary type
BZ	Alarm units
C	Controls
CA	Computers auxiliary units
CD	Controlling devices
CM	Comparators
CN	Compensators
CP	Computers
CU	Couplers
CV	Converters (electronic)
CW	Radomes
CX	Cable assemblies (non RF)
CY	Cases and cabinets
DA	Load, dummy
DI	Data transmission
DT	Detecting heads
F	Filter units
FO	Fiber optics
FR	Frequency measuring device

G	Generators, power
H	Head, hand, chest sets
HD	Environmental apparatus
ID	Indicator units (non CRT types)
IM	Intensity measuring devices
IP	Indicator units (CRT type)
KG	Key generator
KY	Keying devices
LA	Laser
LS	Loudspeakers
M	Microphones
MD	Modulators, demodulators and discriminators
ME	Meters
MK	Miscellaneous kits
ML	Meteorological devices
MO	Multipurpose
MT	Mountings
MU	Memory units
MW	Microwave
MX	Miscellaneous
O	Oscillators
OE	Antenna groups

PL	Plug-in units
PP	Power supplies
PU	Power equipment
R	Receivers
RB	Robotics
RD	Recorder-reproducers
RE	Relay assembly units
RL	Reeling machines
RO	Recorders
RT	Receiver transmitters
S	Shelters
SA	Switching units
SB	Switchboard
SG	Generator, signal
SM	Simulators
SU	Optical units
SY	Speech, secure
T	Transmitters
TA	Telephone apparatus
TD	Timing devices
TF	Transformers
TH	Telegraph apparatus
TN	Tuning units
TR	Transducers
TS	Test units
TT	Teletypewriters and facsimiles
ZM	Impedance measuring devices