Filofax is a company based in the UK that produces a range of personal organisers that are traditionally leather bound and have a six-ring loose-leaf binder system. The name originates from an abbreviation of the phrase "file of facts". The company name was coined for the name of the product when it was founded in 1921. Filofax is part of the UK-based Letts group. In 2006, Phoenix Equity Partners led a secondary buy out of the business. The deal provided an exit for private equity firm Dunedin Capital Partners.