Piotr Ćwiakowski - analiza danych

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

62.01.Z - Computer programming activities

62.02.Z - Computer consultancy activities

62.09.Z - Other information technology and computer service activities

63.99.Z - Other information service activities not elsewhere classified

74.90.Z - Other professional, scientific and technical activities not elsewhere classified

82.99.Z - Other business support service activities not elsewhere classified