A Bibliographical Sketch of All-Magnetic Logic Schemes

An all-magnetic logic scheme is one with which a workable digital system could be constructed involving only magnetic elements, current-carrying conductors, and sources of clock pulses. Historical developments of both resistance schemes (dependent upon coupling-loop resistance) and nonresistance schemes (possessing at least first-order independence of coupling-loop resistance) are described, with reference to all relevant published work known to the authors. Included are: 1) schemes using electric-circuit transfer linkage with simple cores, multipath cores, and thin-film elements, and 2) schemes using continuous magnetic structures where transfer linkage is purely magnetic.