WOA (Web Oriented Architecture) is an architectural style based on REST principles that uses resources and URIs to identify types of web objects. It provides a unified information architecture that is scalable, reusable, and federated. WOA focuses on resources rather than explicit services and uses HTTP as the primary interaction protocol. It is a substyle of SOA but emphasizes bottom-up design and loose coupling between services. Key technologies from Oracle that support WOA include WebLogic Portal, Oracle Coherence Data Grid, and RESTful APIs.