CM, CL2, CL3, CATV = UL rated for all residential, single-floor commercial
CMR, CL2R, CL3R, CATVR = Riser rated for commercial multi-floor use (in building's riser)
CMP, CL2P, CL3P, CATVP = Plenum for use in true plenum air-handling space
You can sub a CMP or CMR for CM. You can sub CMP for CMR.
For residential 2 stories or less, I believe all that is ever needed is non-riser general use cabling (even if in what would be considered a Plenum space in commercial buildings). For instance, you don't have to use Plenum above a drop-tile ceiling application. This is because you generally have egress from any habitable room in this situation. Multi-family, and condo generally have to follow commercial codes.
As riser (ends in an 'R') is not MUCH more expensive compared to general use cabling (no 'R') most installers will only stock and use the Riser equivalent - especially for network cabling. It would be rare, however, to find riser rated coaxial cable or speaker wire in a home. Same goes for burglar alarm wire.
Hope this helps (from someone who used to work for a wire manufacturer)