# Nop-Head-Notation

A head abbreviation (IP, RH, WH, or FH) surrounded by question marks refers to that head being used as a default, when the instruction in question is being executed, but if the instruction is followed by a no-operation (nop) instruction, the nop will alter the register used. A nop-A instruction indicates the instruction pointer (IP), nop-B is the read-head (RH), nop-C is the write-head (WH), and there is no way to use the flow-head (FH) unless it is by default.