Letters CC, CD, CS - what does it mean?

["Maxim Gatsuts" <maxim@hugo.kiev.ua>]

Hi fellow listers!

I've heard rumors that letters CC, CD, CS after the model number (100CC,
4000CS) have direct meaning like CC - Complete Comfort, CD - Complete
Diplomatic etc. Is it true?
It is understandable that it means some set of options. Does it mean engine
type as well?

Regards,

Maxim
'85 80Q