The document summarizes the history of Ubuntu's Unity desktop environment from its debut in 2010 to its end in 2017. It started as an interface for netbooks and became Ubuntu's default desktop in 2011. Unity aimed for convergence across devices but ultimately failed to gain significant mobile usage. In 2017, Canonical announced it would shift Ubuntu back to GNOME and end development of Unity and the Mir display server. While some efforts have emerged to continue Unity, it and the Ubuntu mobile project were ultimately shut down.