"Half" is obviously an exaggeration but apart from time-sharing operating systems, the Internet, what is now CSAIL and (partially) GPS, they sponsored a ton of open source projects. They used to maintain a catalog[0]. The Web Archive version[1] contains a partial list (e.g. OpenBSD was sponsored only for a few years and is not included there).
"Half" is obviously an exaggeration but apart from time-sharing operating systems, the Internet, what is now CSAIL and (partially) GPS, they sponsored a ton of open source projects. They used to maintain a catalog[0]. The Web Archive version[1] contains a partial list (e.g. OpenBSD was sponsored only for a few years and is not included there).
[0] https://www.darpa.mil/opencatalog
[1] https://web.archive.org/web/20140301185004/https://www.darpa...