From MorphOS Library
Commodities are tools which are run as background processes affecting system behaviour.
Commodities are typically started with no GUI, so cannot be usually be shut down by accessing a menu or using a shortcut key. Exchange (the Commodity Manager tool) is used to start and stop individual commodities and access their interface to adjust settings.
Exchange is the commodities manager. This allows the user to monitor which commodities are running, manage their behaviour and settings, and activate/deactivate/remove individual commodities. (Also available though Ambient RMB > Utilities > Exchange) Exchange is also quite useful for accessing applications whose windows have been 'hidden'.
Manages hardware audio input and output mixer settings. Analogous to Master Controls. See section on MorphOS audio subsystem for a fuller explanation. Software volume audio controls available through AHI and volume control screenbar are subservient to these master settings.
Allows disabling or repurposing the Caps Lock key (useful for limited keyboards, eg iBook).
Allows Right Mouse Button (RMB) to be emulated by using the left mouse button whilst holding a qualifier key (qualifier key(s) can be configured). Particularly useful on Apple laptops, or when using a single-button Apple mouse.