Estridge and wife Mary Ann were killed in the crash of Delta Air Lines Flight 191 at Dallas/Fort Worth International Airport on August 2 , 1985 . He was 48 years old . The Estridges were survived by their three daughters . At the time of his death , IBM ESD , which included the development and manufacturing of the IBM PC , PC DOS , PC LAN and TopView , had nearly 10,000 employees and had sold over a million PCs
Delta Air Lines Flight 191
Delta Air Lines Flight 191
Philip Don Estridge