Object Adapter

It is the glue between CORBA object implementations and the ORB itself. It is responsible for many things.
Object registration: supplies operations that allow programming language entities to be registered as implementations for CORBA objects.
Object reference generation: generates them.
Server process activations: start it if need it.
Object activation: activate them if they are not already active.
Request de-multiplexing: cooperate with ORB to ensure that requests can be received over multiple connection.
Object upcalls: dispatch requests to registered objects.