distribution	mobility	language	platform	reflection
COM	--	--	*	--	+/--
DCOM	+	--	*	+/--	+/--
CORBA	+	--	*	*	+/--
Java/Beans	--	classes	Java	*	+
Java/RMI	+	classes	Java	*	+
Voyager	+	objects	Java	*	+