Unified Font Object (.ufo)
The Unified Font Object (UFO) file extension, developed by Tal Leming, Just van Rossum, and Erik van Blokland, is an XML-based format for digital fonts. Introduced in 2003, it ensures application independence, human readability, and editability. Widely adopted in typeface design and font production tools, UFO facilitates seamless font data exchange across platforms. The latest version, UFO 3, was released in 2012.