The history of Haiku, a free, open-source operating system, began in 2001. As of January 2016, as refactoring FLOSS effort of BeOS named initially "OpenBeOS". It used open sourced code of a Tracker file browser and NewOS kernel. Today (as of February 2022), after 4 alpha and 3 beta versions, work on Haiku continues with a fourth beta planned and 'Nightly' builds available between releases.