He was instrumental in the development of ICL's Content Addressable File Store[2] (CAFS) and he developed em, the Unix editor, which inspired Bill Joy to write vi.

[3][4][5] In 1960 George Coulouris graduated with an honours degree in Physics from University College London.

[citation needed] Coulouris worked at IBM and other companies before joining the London Institute of Computer Science as a Research Assistant and then Imperial College London as a lecturer in 1965.

[citation needed] In 1971 he joined Queen Mary College as a lecturer.

[6] He retired from Queen Mary in 1998, but continued as a visiting professor at the University of Cambridge.