Michał Billewicz. Młodość, inwencja, biznes.

70.22.Z - Business and other management consultancy activities

18.12.Z - Other printing

32.40.Z - Manufacture of games and toys

47.91.Z - Retail sale via mail order houses or via Internet

62.01.Z - Computer programming activities

62.02.Z - Computer consultancy activities

74.20.Z - Photographic activities

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