Origins of DOS
Look here to find the true record of how DOS got started
on its way to becoming, for a considerable period of time, the most widely used
computer program in the world. We know the facts, because our founder, Tim Paterson,
wrote the first versions -- up through MS-DOS 1.25 (completed March, 1982).
Tim has also created a blog where he discusses topics such as the design of DOS
and the first DOS machine. Find it at
We are now expanding this site beyond articles and excerpts. We are adding documentation
of the first DOS machines, made by Seattle Computer Products.
Stay tuned and be patient while we grow this historical
collection. The process is time-consuming as the original manuals are scanned, recognized,
and converted to PDF while retaining the original look as precisely as possible.
First DOS Computer Ad