Boris Chertok
Boris Yevseyevich Chertok (Russian: Бори́с Евсе́евич Черто́к; 14 March [O.S. 1 March] 1912 – 14 December 2011) was a Russian engineer in the former Soviet space program, mainly working in control systems, and later found employment in Roscosmos. Major responsibility under his guidance was primarily based on computerized control system of the Russian missiles and rocketry system, and authored the four-volume book Rockets and People– the definitive source of information about the history of the Soviet space program.