[bolger] Re: Plywood nomenclature

I am looking at a listing of plain sliced premium face plywood.

the listing looks like:

1/4" genuine mahogany plywood. A-3, VC.
or:
1/4" " " " MDFC
or:
1/4" " " " A-3, IMP, VC

Can someone out there venture a guess as to what the alpha-numeric suffixes
indicate?

TIA

James Fuller