OLAP (Online Analytical Processing): An approach to swiftly answer Multi-dimensional Analytical (MDA) queries. OLAP tools enable users to interactively analyze multi-dimensional data from multiple perspectives.
Online Analyzer: Enables you to create ad hoc pivot views of your data. In a pivot table structure, you can drag-and-drop data elements, which can be afterwards arranged, filtered, and summarized.
Oracle Reports: A tool for developing reports against data stored in an Oracle database. Oracle Reports consists of Oracle Reports Developer (a component of the Oracle Developer Suite) and Oracle Application Server Reports Services (a component of the Oracle Application Server).