Krzysztof Jakubowski

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

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

59.20.Z - Sound recording and music publishing activities

62.09.Z - Other information technology and computer service activities

63.12.Z - Web portals

73.11.Z - Advertising agencies activities

85.41.C - Teacher training institutions

85.42.Z - Colleges

90.01.Z - Performing arts activities