CBM
From CPCWiki - THE Amstrad CPC encyclopedia!
The Command Bar Menu (CBM) is a part of FutureOS. It provides an user-interface for all own programs. You can use hierarchical pull-down menues to select functions. Windows aren't used, because the CPC-screen is little enough.
CBM is not part of the core OS itself. The source code is available and it's possible to use CBM for any FutureOS program.
So every program can have nearly the same appearance, this makes it easier to work with different programs.
Examples are the MP3-Player, the Sprite Konverter GMSK and other applications for FutureOS which use CBM.
The source code can be downloaded here:
Web link: [http://tech.groups.yahoo.com/group/FutureOS/files/Source_Codes/]