It is characteristic of the digital world that data in no sphere of human activity resides in a
single physical location, but constantly circulates the virtual highways; this is because
knowledge in a technological era has to be networked uninterruptedly, meaning that
information from all areas of life is available to a huge number of people. If data mining is a
search for a gold vein that will increase a company’s profitability, discover inconsistencies in
accounting practices, or enable citizens to dig out the best price of land for a family house,
then we definitely have to keep digging. It is a technique offering undeniable benefits by
improving the quality of life and making one’s life easier, and bringing more order and
responsibility into the behavior of institutions.