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Chapter 22. Networking > Distributed Objects
22.5. Distributed Objects
One of the most powerful parts of the foundation framework is the distributed objects system. This allows objects in different processes, possibly on different computers, to be used almost transparently.
The distributed objects system in OS X is based on NeXT’s Portable Distributed Objects (PDO) product. This provided bridges to Microsoft’s COM and to CORBA. PDO was released before Microsoft’s DCOM and was the only way of connecting together COM components on different computers for a while. As a historical curiosity, the keynote speech where Steve Jobs unveiled PDO can be found online.
