According to <STRONG>The Data Warehousing Institute</STRONG> (TDWI): <BLOCKQUOTE> A "Data Warehouse" is a data structure that is optimized for distribution. It collects and stores integrated sets of historical data from multiple operational systems and feeds them to one or more data marts. It may also provide end-user access to support enterprise views of data. </BLOCKQUOTE> If there is demand, we may grow sub-categories that mirror the strategy used in the Atlas of Data Warehousing (also from TDWI) for related categories: <UL> <LI><a href="/Computers/Software/Databases/Data_Warehousing/Data_Integrity_and_Cleansing_Tools/">Data Integrity and Cleansing Tools</A></LI> <LI><a href="/Computers/Software/Databases/Data_Warehousing/Data_Modeling_Tools/">Data Modeling Tools</A></LI> <LI><a href="/Computers/Software/Databases/Data_Warehousing/Extraction_and_Transformation/">Extraction and Transformation</A></LI> <LI>Data Movement Tools</LI> <LI>Information Servers (@link to Databases)</LI> <LI><a href="/Computers/Software/Databases/Data_Warehousing/Decision_Support_Tools/">Decision Support Tools</A></LI> <LI>Turnkey Decision Support Systems</LI> <LI>Data Warehouse Enabled Applications</LI> <LI>Data Warehouse Administration and Management Tools</LI> <LI>Data Warehouse Platforms (@link)</LI> <LI><a href="/Computers/Software/Databases/Data_Warehousing/Consultants/">Data Warehouse Consultants</A></LI> </UL>