1. Value and Distribution of Gross Value Added by Industry in 2018http://www.ksh.hu/docs/eng/xstadat/xstadat_annual/i_qpt002d.html
2. EMIS Benchmark Key Indicators: Information (51)https://www.emis.com/php/benchmark/sector/indicators?gid=1&pc=HU&prod%5B0%5D=HU&indu=51&change_selected_countries=1&c=EUR
3. Information and communication technology (ICT)
4. International Standard Industrial Classification of All Economic Activities (ISIC),2008
5. EMIS Benchmark Income Statement: Information (51)https://www.emis.com/php/benchmark/sector/indicators?gid=3&pc=HU&prod%5B0%5D=HU&indu=51&change_selected_countries=1&c=EUR