86-DOS

86-DOS, also known as QDOS (Quick n' Dirty Operating System), was an x86 clone of CP/M operating system written by Tim Patterson, employee of the Seattle Computer Products. 86-DOS was bought by Microsoft and was used as a base for their market success, MS-DOS

References

• MS-DOS 1.x. (2003). Retrieved January 14, 2019, from https://winworldpc.com/product/ms-dos/1x
• MS-DOS. (2018, December 30). Retrieved January 14, 2019, from https://en.wikipedia.org/wiki/MS-DOS#History