Free and Open Source (FOSS) software projects often have humorous names for their packages. Some of the earliest FOSS projects, from the 1980s, used recursive acronyms for their names. A recursive acronym is where one of the constituent letters is provided by the acronym itself. Probably, the best known example is the GNU project which stands for GNU's Not Unix. Many years later the graphics package GIMP arrived, which stands for GNU Image Manipulation Program.