[Milsurplus] Re: [The WS No.19 Group] Question about SCR and AN nomenclature

[J. Forster]

Richard Loken wrote:

>         SCR was part of the U.S. Army nomenclature
>         AN/ is a joint army navy nomenclature which started in mid WW2
>
> According to the lads over on the U.S. boatanchor list, SCR means "System
> Complete, Radio" which makes it a top level packing list like you said.
> Ditto for AN/ numbers but an AN/PRN-10 comes in a much smaller box than
> the AN/FLR-9.

I've heard of two possibles for both acronyms:

SCR = [System or Set], Complete, Radio
BC = [Basic or Box], Component

Does anyone know definitively?
-John