straight to the source code: <a href="https://images.gatesnotes.com/12514eb8-7b51-008e-41a9-512542cf683b/34d561c8-cf5c-4e69-af47-3782ea11482e/Original-Microsoft-Source-Code.pdf" rel="nofollow">https://images.gatesnotes.com/12514eb8-7b51-008e-41a9-512542...</a>