LSI Corporation is an electronics company based in Milpitas, California that designs semiconductors and software that accelerate storage and networking in datacenters and mobile networks.

LSI Corporation was founded under the name LSI Logic in 1981 in Milpitas, CA by Wilfred Corrigan as a semiconductor ASIC company after he left as CEO of Fairchild Semiconductor in 1979. The other three founders were Bill O'Meara (marketing and sales), Rob Walker (engineering) and Mitchell "Mick" Bohn (finance). The firm was initially funded with $6 million from noted venture capitalists including Sequoia Capital. A second round of financing for an additional $16M was completed in March 1982. The firm went public as LSI on Nasdaq on Friday May 13, 1983 - netting $153M, the largest tech IPO up to that date.

LSI built its own wafer fabrication, packaging and testing facilities in Milpitas as well as utilizing excess capacity at Toshiba for manufacturing - an early example of the fabless semiconductor manufacturing model. LSI Logic expanded world wide by establishing stand-alone affiliate companies in Japan, Europe and Canada. Nihon LSI Logic based in Tokyo, Japan was financed in April 1984 through a $20M private offering. LSI Logic Ltd based in Bracknell UK was financed in June 1984 by an additional $20M private placement and LSI Logic Canada based in Calgary, Alberta went public on the Toronto stock exchange. Each affiliate sought to develop independent manufacturing facilities through alliances, purchases or independent development. In 1985, the firm entered into a joint venture with Kawasaki Steel - Japan's third largest steel manufacturer - to build a $100M wafer fabrication plant in Tsukuba, Japan.