O - Definitions
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O
object-relational mapping (ORM)
Object-relational mapping (ORM) is a way to align programming code with database structures.
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Open Service Gateway Initiative (OSGi)
OSGi (Open Service Gateway Initiative) is an industry plan for a standard way to connect devices such as home appliances and security systems to the Internet.
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OpenJDK
OpenJDK is a free, open-source version of the Java Development Kit for the Java Platform, Standard Edition (Java SE).