In 1998 Microsoft published at least one public beta release of their [[Services for UnixUNIX (SFU)<ref>{{cite web|Servicesurl=http://www.microsoft.com/windows/sfu/unixproresources |title=Microsoft Resources for UNIX (SFU)]]professionals |accessdate=2023-09-08 |url-status=dead |archiveurl=https://web.archive.org/web/20031022182301/http://www.microsoft.com/windows/sfu/unixproresources/ |archivedate=2003-10-22 }}</ref> based on the [[MKS Toolkit|MKS toolkit]], which in turn included some [[GNU#Components|GNU utilities]] licensed under the [[GPL]]. Microsoft fulfilled the obligations imposed by the GPL and other Open Source Software licenses by offering the source code of these software components and their licenses for download.
[[Services for Unix|Services for UNIX (SFU)]] v1.0 was released in February 1999.
