Konrad Rzeźniczak

62.01.Z - Computer programming activities

62.02.Z - Computer consultancy activities

62.03.Z - Computer facilities management activities

62.09.Z - Other information technology and computer service activities

63.11.Z - Data processing, hosting and related activities

63.12.Z - Web portals

63.91.Z - News agency activities

63.99.Z - Other information service activities not elsewhere classified

71.20.B - Other technical testing and analysis

72.19.Z - Other research and experimental development on natural sciences and engineering

85.59.B - Other out-of-school forms of education, not elsewhere classified