🚀 go-pugleaf

VCII - this data stream is being shut off as we speak
       and the tecnology is moving to VCII+. Too many
       hacks broke the code.

VCRS - Not really used yet, however it is available.
       RS - renewable subscription - the module has  
            a 'card reader' on it.

The modules aren't cheap (>300) and are required for
use in the receiver for you to be able to subscribe
to commercially available scrambled channels.

You will also see these acronyms

CSPP consumer safety protection plan - 3 year guarantee
     on the module from GI if they change scrambling
     technology you get a free upgrade (if your box
     hasn't been tampered with)

MOM - Modem on Module - able to call in for pay per view
     through on-screen programming.

Try rec.video.satellite FAQ for further info.