Seattle Computer Products (where tim wrote dos) is right across the street from
icm.museum in the same business park.
We have a gazelle on display which boots dos 1.25.
Tim worked at Microsoft and extensive modifications and development were done to make dos suitable for the IBM PC launch.
The image shown is fairly far removed from what dos was like prior to Microsoft purchasing it and improving it.
Did you know Microsoft didn’t develop MS-DOS, but bought it off of a programmer named Tim Paterson?
Tim Paterson (born 1 June 1956) is an American computer programmer, best known for creating 86-DOS, an operating system for the Intel 8086.