org.eclipse.ui.commands
Interfaces 
ICategory
ICategoryListener
ICommand
ICommandHandlerService
ICommandHandlerServiceListener
ICommandListener
ICommandManager
ICommandManagerListener
ICommandService
ICommandServiceEvent
ICommandServiceListener
ICompoundCommandHandlerService
IContextBinding
IHandler
IImageBinding
IKeyConfiguration
IKeyConfigurationListener
IKeySequenceBinding
IMutableCommandHandlerService
IWorkbenchCommandSupport
IWorkbenchPageCommandSupport
IWorkbenchPartSiteCommandSupport
IWorkbenchWindowCommandSupport
Classes 
CategoryEvent
CommandContributionItem
CommandEvent
CommandHandlerServiceEvent
CommandHandlerServiceFactory
CommandManagerEvent
CommandManagerFactory
KeyConfigurationEvent
Exceptions 
NotDefinedException