e transfer of his theories, through meetings like the one at which this picture was taken, to the military research which he refused to support after World War II. (Photo courtesy of M.I.T.) The Historical Origins of Spread-Spectrum Communications and built demonstration hardware. Bob Hunting was assigned to investigate the generation of long m-sequences and spent a considerable amount of time exercising Sylvania's then-new UNIVAC 1 in the Corporate Computer Center at Camillus, NY, and eventually produced an extensive list of "per- fect word" generators. R. L. San Soucie and R. E. Malm developed nonlin- ear sequence-combining techniques for the BLADES prototype, the result being an SS carrier with a period of about 8000 centuries. Oliver Selfridge of Lincoln Laboratory's Group 34 became the government representative whose approval was required on Sylvania's SS code designs for Air Force contracts, but was not involved with the Navy's BLADES effort. Early work by others on linear-feedback shift registers includes that of Gilbert [182], Huffman [183], and Birdsall and Ristenbatt [184]. Additional insights were available from the prewar mathematical literature, especially from Ward [185], Hall [186], and Singer [187], [188]. Of course, in the top secret world of cryptography, key-stream generation by linear recursions may very well have been known earlier, particularly since Prof. Albert and others of similar stature were consultants to NSA. But it is doubtful that any of these had a direct impact on the pioneering applications to SS commu- nication in 1953-54. 2.2.12 ANA/ARC-50 Development at Magnavox In 1953, a group of scientists interested in the design of computers left the University of California at Los Angeles and formed a research laboratory under an agreement with the Magnavox Corporation. Their first contact with SS systems came when JPL approached them with the problem of building DS-SS code generators for the Jupiter missile's proposed radio navigation link. This exposure to JPL's work on PN sequences a