Avro Keyboard is a free and open-source, graphical keyboard layout changer for the Microsoft Windows operating system, Ubuntu and other flavours of Linux. It is the first free Unicode- and ANSI-compliant Bengali keyboard interface for Windows that was published on 26 March 2003. Avro has support for fixed keyboard layout and its own phonetic (type Bengali through its romanized transliteration) layout. Assamese language can be written too. The software has a keyboard layout editor, a portable edition and various tools and fonts.