iii
LIST OF MAIN GROUPS IN R.D. & C.E.
Codes marked "Restricted" can only be used where no other main group is
suitable. Codes in italics are not available for new designs, suggested
alternatives are given where possible.
AM AMPLIFIERS .
AP APPARATUS (code by function)
AT ATTENUATORS
BA EQUIPPED BAY (code by function)
BX BOXES (code by function)
CA EQUIPPED CABINETS (code by function)
CD CODERS
CH UNEQUIPPED CHASSIS
CM CAMERAS (discontinued)
CO CONVERTERS
CS UNEQUIPPED CASES
CT UNEQUIPPED CABINETS
DK DESKS (Restricted)
DM DEMODULATORS
EP EQUIPMENT (Restricted)
EQ EQUALISERS
FL FILTERS
FW UNEQUIPPED FRAMEWORKS
GE GENERATORS
IN INDICATORS (use MN)
JF JACKFIELDS
LS LOUDSPEAKER ASSEMBLIES
MA MATRICES (code by function)
MC MICROPHONES (discontinued)
MD MODULATORS
ME MEASURING EQUIPMENT
MN MONITORS
MP MISCELLANEOUS PARTS
MX MIXERS
NE NETWORKS (code by function)
os OSCILLATORS
OT OUTFITS (code by function)
PA EQUIPPED PANELS (Restricted)
PN UNEQUIPPED PANELS
PS POWER SUPPLIERS
RC RECEIVERS
RD RECORDING EQUIPMENT
RP REPRODUCING EQUIPMENT
SC SCANNERS (use SE)
SE SWITCHING EQUIPMENT
SH SHELVES (discontinued)
ST STANDS (discontinued)
TA TABLES (discontinued)
TE TESTERS
TM TRANSMITTERS
UN UNITS (Restricted)

3