Wikipedia, “Electrical wiring”:
Modern nonmetallic sheathed cables (NMC), like (U.S. and Canadian) Type NM, consist of two to four thermoplastic insulated wires and a bare wire for grounding (bonding) surrounded by a flexible plastic jacket. Many call this “Romex ™” cable since it was the first of its type, by Rome Cable. (The trade name is owned by Southwire as of 2006.)
Dictionary of Building Preservation:
Romex A trademarked electrical nonmetallic cable with thermoplastic sheathing manufactured by Rome Cable Co.
Rob is right–its 80 out, not in.