MIL-STD-196 Joint Electronics Type Designation SystemThe purpose of this standard is to provide the policies, requirements and procedures for the preparation and submission of Requests for Nomenclature RFN under the JETDAS.

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Group example of use indicators

Family name

(Not to be construed as limiting the application of the group indicator)

OA   Miscellaneous groups

Groups not otherwise listed.  Do not use if a

more specific group indicator applies.

OB   Multiplexer and/or demultiplexer groups

All types

OD   Indicator groups

All types

OE    Antenna groups

All Types

OF    Adapter groups

All types

OG   Amplifier groups

All types

OH   Simulator groups

All types

OI     Cryptographic groups

All types

OJ     Consoles and console groups

All types

OK   Control groups

All types

OL    Data analysis and data processing groups

All types

OM   Modulator and/or demodulator groups

All types

ON   Interconnecting groups

All types

OP    Power Supply groups

All non-rotating types

OQ   Test Set groups

All types

OR   Receiver groups

All types

OS    Satellite groups

All types

OT    Transmitter groups

All types

OU   Converter groups

All types

OV   Generator groups

All types including power generating

equipment

OW  Terminal groups

Telegraph, radio, telephone, etc.

OX   Coder, recoder, interrogator, transponder

groups

All types

OY   Radar Set groups

Do not use if more specific indicator applies

OZ    Radio Set groups

Do not use if a more specific indicator (OE,

OR, OT) applies