By E. D. Reilly, F. D. Federighi
Communications of the ACM,
September 1965,
Vol. 8 No. 9, Pages 557-558
10.1145/365559.365593
Comments
A computer design is described which permits subroutines to be executed backward as well as forward, either with their instructions unchanged or replaced with conjugate instructions. It is shown that using this concept a number of new subroutine types can be developed with rather unusual properties. Since these properties are analogous to certain matrix operations, a arallel nomenclature is suggested for their classification.
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