Apple II DOS Version 3.1 Source Code Released to the Public

Apple II DOS Version 3.1 Source Code Released to the Public

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The Computer History Museum has received permission to release the source code of Apple II DOS 3.1 to the public. The code was written by Paul Laughton, a contract programmer for Shepardson Microsystems, in just seven weeks.

On April 10, 1978 Bob Shepardson and Steve Jobs signed a $13,000 one-page contract for a file manager, a BASIC interface, and utilities. It specified that “Delivery will be May 15″, which was incredibly aggressive. But, amazingly, “Apple II DOS version 3.1″ was released in June 1978.

With thanks to Paul Laughton, in collaboration with Dr. Bruce Damer, founder and curator of the DigiBarn Computer Museum, and with the permission of Apple Inc., we are pleased to make available the 1978 source code of Apple II DOS for non-commercial use. This material is Copyright © 1978 Apple Inc., and may not be reproduced without permission from Apple.


There are seven files in the release which can be downloaded from the link below...

Read More [via Engadget]


Apple II DOS Version 3.1 Source Code Released to the Public
Eddie - November 16, 2013 at 5:08am
My dad bought the computer for me when I was a boy floppy disk and Internet was just a tape cassette learn to copy floppy disk and programs at age 11
Lolwut - November 14, 2013 at 2:54pm
News on an 80s computer? I like apple but this nowadays, meh!
Justin - November 14, 2013 at 7:15am
Hahahahahahah to the above comment
Sasukekun77 - November 14, 2013 at 3:20am
Omg so important (not really)
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