He enrolled in San Francisco State University (SFSU), majoring in math and studying helicopter design and construction as a hobby.Credited along with Faggin, Hoff, and Masatoshi Shima of Busicom as co-inventor, Mazor helped define the architecture and the instruction set for the revolutionary new chip, dubbed the Intel 4004.Although there was an initial reluctance on the part of Intel marketing to undertake the support and sale of these products to general customers, Hoff and Mazor joined Faggin, designer of the 4004 and project leader, and actively campaigned for their announcement to the industry and helped define a support strategy that the company could accept.In 1993, then working at Synopsys, he coauthored, with Patricia Langstraat, a book on chip design language entitled A Guide to VHDL.In 2009 the four were inducted as Fellows of the Computer History Museum "for their work as the team that developed the Intel 4004, the world's first commercial microprocessor.