Databases & Data Mining Systems
A database is a field of information, that is used to contain information. This could be anything from banking records, sales information to use in the government.
Data mining is a way of checking databases for hidden patterns with the data enclosed. This is done to help research the future results in the system, an example of this would be a package in a retail environment to help a company find more customer who have a common particular interest with the store.
Data mining is used commonly in Science and Maths, though can be used to filter and make use of consumer data retrieved from online web sites, this could be search history and purchases.