1. A computer system for simulating reticular formation operation comprising, in combination: (a) an input computer for producing signals representing, respectively, both the actual environment and the intended action to be taken; and (b) a command computer, connected to said input computer, for executing a program on the principle of a permutograph thereby to give effect to said intended action in dependence upon said environment, said command computer comprising: (1) a plurality (n) of addressable storage modules (M-1, M-2,. .. M-i,. .. M-n), each storage module including a program sequence memory for storing, as a storage module address, a unique program sequence corresponding to at least one intended action, the different program sequences stored, respectively, in different program memories being permutations of each other; and (2) means for connecting said storage modules together into closed circuits, called "Hamilton loops", each Hamilton loop forming a series connection of a plurality of storage modules in a specific permutation of said program sequences that identify said storage modules by address; whereby a specific run through the storage modules in the sequence defined by a Hamilton loop prescribes a specific course of action to be taken to effect said intended action.