Giedd Gary R, Maley Gerald A, Perkins Merlyn H: Random number statistical logic test system. International Business Machines Corporation, October 19, 1971: US3614608 (61 worldwide citation)

A system for testing complex circuitry primarily in large scale integration, where a great number of inputs and outputs must be tested and the internal circuitry is inaccessible. The test system has a random number generator which simultaneously applies a plurality of signals in a random pattern to ...