What do the model letters mean?

[killahcam]

I know PC stands for "Portable Component", but does anyone know what some of the others mean? Such as: RC, RX, TRK, etc? Would love to know the origins behind some of these "call letters".

 

[DPaignall]

Pretty sure RC is Radio Cassette and TR is for Tape Recorder other than that IDK (I don't Know).

 

[Zippy]

I can imagine RX is to signal the line of radios being sucessors to a previous RC line of models. Not sure if there's more meaning behind the X. I think someone suggested Sharp's GF stood for Great Finder referring to radio reception.

TRC might stand for Transistor Radio Cassette? TRK maybe too, but they didn't want to use the C as well or somethin?
SRC will probably be Stereo Radio Cassette
SR Stereo Radio...

Telefunken's CR should be Cassette Recorder