(cryptography) An mixed electronic and mechanical stream cipher composed of a serious of wheels, widespread use from the 1920s–1970s.

plural of ghost in the machine

plural of ghost in the machine

plural of thinking machine

(dated) A computer.

plural of threshing machine

(accounting, computing, statistics, dated) Electromechanical machine used to summarise information and perform accounting calculations.

plural of tabulating machine

(computing theory) A hypothetical computational model, related to Turing machines, that would be capable of carrying out computations involving a countably infinite number of algorithmic steps.

plural of Zeno machine