This is a summary of designations that you may see on Coax cable. Keep in mind that there are several major cable manufacturers and each may choose its own naming schemes for consumer-grade cables.
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Terms are listed alphabetically:

• 11 (##)
  

  2-digit number specifies percentage of braided shield coverage

• A
  

  Generally meaningless.

• B
  

  Bonded foil

• CL2, CL3
  

  Class 2, Class 3

• CL2X, CL3X
  

  The lowest fire-rated cables and must comply with UL VW-1 Vertical-Speciman Flame Test remote-control, signaling and power-limited cables.

• CM
  

  Communications use: communications network and telecommunications cabling.

• CMH, FT1
  

  CSA Flame Test FT-1coax

• CMH, FT4
  

  CSA Flame Test FT-4

• E
  

  Polyethylene jacket

• F, APD
  

  Flooded underground cables, Amorphous polypropylene drop.

• FPL
  

  Power-limited fire protective signaling cables

• M, S
  

  Messengered/serial/overhead cables used to hang drop from the house to the street.

• MP
  

  Multipurpose cable

• P
  

  Plenum cables

• PLTC
  

  Power-limited tray cable

• R
  

  Riser cables

• SS, Super, QS
  

  Quad shielding

• TS
  

  Tri-shielding

• U
  

  Utility/general use cables to be used outdoors, indoors where protected but not in an air plenum.

• V, PVC
  

  Polyvinylchloride jacket