John L. Hennessy

John Leroy Hennessy (born September 22, 1952) is an American computer scientist and businessman who has served as the chairman of Alphabet Inc. since 2018. One of the founders of MIPS Technologies and Atheros, he was the 10th president of Stanford University from 2000 to 2016. Along with David Patterson, Hennessy was a recipient of the 2017 Turing Award for their work in developing the reduced instruction set computer (RISC) architecture, which is now used in 99% of new computer chips. Marc Andreessen has called him "the godfather of Silicon Valley."

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