Mercurial (Hg) SCM

Mercurial, often referred by its chemical symbol 'Hg', is a prominent distributed version control system designed to handle large-scale software development projects. It was originally authored by Matt Mackall and released in 2005, around the same time as Git, as a high-performance alternative to older systems like BitKeeper. The software is built primarily in Python with performance-critical parts written in C.

As an open-source project, Mercurial does not have a single manufacturing location; rather, it is developed by a global community of contributors. While it was once the primary choice for major tech firms like Mozilla and Facebook (now Meta), many organizations have since transitioned to Git. However, it remains a vital tool in specific workflows and is maintained under the GNU General Public License (GPL) v2.

The project is currently a community-driven initiative. While it is not owned by a corporation in the traditional sense, major development and infrastructure support have historically been provided by various tech entities and the Software Freedom Conservancy.