• 1956
    (b.) - ?


In 1978 he designed a schematic of Microsoft's Z-80 SoftCard which had a Z80 CPU and ran the CP/M operating system on an Apple II. A month later, Intel released the 8086 CPU, and Paterson went to work designing an S-100 8086 board, which went to market in November 1979. Along with other projects he authored QDOS (Quick and Dirty Operating System), later to be renamed 86-DOS which later became MS-DOS.