Data warehousing systems: How theywork and what they can do for your company By now you probably have heard the ITbuzzwords "data warehouse" - and wondered what a data warehouse is and why asewn products company would be interested in it. As the term suggests, a data warehousecontains a large amount of data. It is a way of organizing business information that canprovide better management visibility and more insight than the traditional informationsystems used to support day-to-day operations.