Home›Articles›How Apple DOS was commissioned, reformatted and outgrownArticleHow Apple DOS was commissioned, reformatted and outgrownArticlesConnectionsSourcesComments (0)Reader Challenges (0)ConnectionsArticle OnApple DOS, Systems Well-attested SourcesWikipedia: Apple DOSVersion history, 1978 contractQuote, Version history, 1978 contractOn 10 April 1978 Apple signed a $13,000 contract with Shepardson Microsystems to write a DOS and deliver it within 35 days.View the SourceAtlas Article Vocabularytier 1AtlasComments (0)No comments yet. Be the first to share a thought.Sign in to join the discussion.Reader Challenges (0)No disputes yet. Spotted an error or a better source? Open the first one.Sign in to dispute this or suggest a correction.