Sophie Wilson, CBE FRS FREng, designed the Acorn System 1, coding the operating system in binary before designing and implementing Acorn Assembler, Acorn MOS, and BASIC. She and Steve Furber designed and implemented the prototype of the BBC Microcomputer—she designed the operating system and designed and implemented BBC BASIC for a succession of processors. She and Furber also codesigned the ARM processor powering Acorn’s computers during the 1990s and virtually every mobile phone and tablet in the world nowadays—more than 180 billion sales of ARM-powered chips to date. She codesigned the ARM3, ARM610, and ARM700 processors and ARM7500FE single-chip computer; created Acorn Replay multimedia software; and developed the Firepath SIMD LIW processor and then cofounded Element 14 to exploit it for ADSL. She studied computer science and mathematics at Cambridge University and has an honorary doctorate of science from the university.