Read up on CP/M and DOS: http://www.computerhistory.org/atchm/microsoft-ms-dos-early-source-code/ http://www.computerhistory.org/atchm/microsoft-ms-dos-early-..

Read up on CP/M and DOS: http://www.computerhistory.org/atchm/microsoft-ms-dos-early-source-code/ http://www.computerhistory.org/atchm/microsoft-ms-dos-early-... Here's a copy of Gary Kidall's autobiography: http://www.computerhistory.org/atchm/in-his-own-words-gary-kildall/ http://www.computerhistory.org/atchm/in-his-own-words-gary-k...