1. A control flow parallel computer system comprising: a plurality of processors; a main memory means for storing information and having memory locations accessible by said plurality of processors; and node drive register means for storing information relating to execution of instructions, said node drive register means being accessible by said plurality of processors, said node drive register means storing a plurality of words, each of said words including a location storing a pointer indicating an instruction to be executed, and a plurality of control token locations for storing control tokens for indicating when the instruction indicated by said pointer is to be executed, each of said control token locations being filled with a control token upon completion of the execution of a prior instruction required to be executed before execution of said instruction indicated by said pointer.