Project updates | Microsoft Open Source Blog

Project updates April 28 2 min read

Continuing the story of early DOS development

In 2018 we (re)-open-sourced MS‑DOS 1.25 and 2.11 and in 2024 we were able to make the source for MS‑DOS 4.

Office lobby with natural light and a modern décor, a group of developers are walking and chatting

Project updates October 9, 2025 4 min read

Marking Drasi’s first anniversary: introducing GQL support for Continuous Queries

Drasi turns one with GQL support—giving developers more ways to build change-driven systems.

Project updates September 3, 2025 2 min read

Bringing BASIC back: Microsoft’s 6502 BASIC is now Open Source

For decades, fragments and unofficial copies of Microsoft’s 6502 BASIC have circulated online, mirrored on retrocomputing sites, and preserved in museum archives.