Most of what's used in enterprise are used, so no examples really needed. Upstream activity tends to be minimal, but it happens, usually indirectly via contract

Most of what's used in enterprise are used, so no examples really needed. Upstream activity tends to be minimal, but it happens, usually indirectly via contractors. There are many stories online that can be found by searching, in regards to specific systems, and some software. There are also various parties working hard to promote more OSS use in DoD, two examples: GAO, OSSI. Not to mention the DoD is mandated to release at least twenty percent of its own custom software as open source. Like anything gov, it's a slow process.