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ngall's Archive on Oct 01, 2007
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March 2001. Anne Thomas Manes, then at Sun, explains that SOA is NOT a new concept.
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Service-oriented systems are not a new concept. Popular service-oriented systems include ONC RPC, DCE, COM, CORBA, JavaTM RMI, and JiniTM technologies. Although all of these systems have a lot going for them, they all require special protocols for communication. A COM client must use COM protocols to speak to a COM service. A Jini client must use Jini protocols to speak to a Jini service. Unfortunately, these special protocols aren't pervasive on the Web, and firewalls routinely block communication. So now, a new type of service-oriented system is evolving: Web services.