Today we are announcing the first preview of the Microsoft build of OpenJDK, a new long-term support (LTS) distribution of OpenJDK that is open source and available for free for anyone to deploy anywhere. It includes binaries for Java 11, based on OpenJDK 11.0.10+9, on x64 server and desktop environments on Linux, Windows, and macOS. We are also publishing a new early access release for Java 16 for Windows on Azure Resource Manager (ARM) and macOS/M1 based on the latest OpenJDK 16+36 release.
Learn more about the preview release and Java at Microsoft in the full announcement blog.
In 2018 we (re)-open-sourced MS‑DOS 1.25 and 2.11, and more recently in 2024 we were able to make the source for MS‑DOS 4.0 available to the public as well. Today, on 86-DOS 1.00’s 45th anniversary, we’re continuing that tradition with the earliest DOS source code discovered to date.
For decades, fragments and unofficial copies of Microsoft’s 6502 BASIC have circulated online, mirrored on retrocomputing sites, and preserved in museum archives. Coders have studied the code, rebuilt it, and even run it in modern systems. Today, for the first time, we're officially releasing it under an open-source license.