Apparently, Tim Paterson worked on MS-DOS up to v1.25 (completed March, 1982). Source: http://www.patersontech.com/dos/origins-of-dos.aspx http://www.patersont

Apparently, Tim Paterson worked on MS-DOS up to v1.25 (completed March, 1982). Source: http://www.patersontech.com/dos/origins-of-dos.aspx http://www.patersontech.com/dos/origins-of-dos.aspx