org.eclipse.ui.activities
Interfaces 
IActivity
IActivityListener
IActivityManager
IActivityManagerListener
IActivityPatternBinding
IActivityRequirementBinding
ICategory
ICategoryActivityBinding
ICategoryListener
IIdentifier
IIdentifierListener
IMutableActivityManager
IWorkbenchActivitySupport
Classes 
ActivityEvent
ActivityManagerEvent
CategoryEvent
IdentifierEvent
WorkbenchActivityHelper
Exceptions 
NotDefinedException