Abstract
The aim of this work is to study the structure of information and telecommunications technologies (ICT) usage in Polish enterprises in 2015. In this paper the overrepresentation maps were considered as a tool of data mining. These maps are crated as the results of GCA algorithm. The analysis of data about ICT in Polish enterprises were shown as an example of GCA application. The advantage of the method is the visualization possibility and legibility of the obtained maps. In this ar-ticle we studied the level of usage of ICT in individual voivodeships, the expenditures for various sectors of ICT for small, medium-size and big enterprises.
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