SOA versus OO

Object Oriented programming believes that the data and behavior be coupled. It does profess a kind of, tight coupling though it has loose coupling features like inheritence.

The coupling in OO is with respect to a specific functionality, which most often requires tight coupling.

SOA, on the other hand is a concept to get the best service(s) working for a cause. The SOA, puts the protocol for integration and data exchange to make service usage easier. It allows the individual software services to be tight coupled or loose coupled. SOA would, rather decide the integration platform with a loosely coupled protocol and a proper data exchange model(currently achieved through web services). Read the SOA definition in my previous post here.