Piotr Bałtruszewicz

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

58.21.Z - Publishing of computer games

58.29.Z - Other software publishing

61.20.Z - Wireless telecommunications activities, excluding satellite telecommunications activities

61.90.Z - Other telecommunications activities

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

70.21.Z - Public relations and communication activities

70.22.Z - Business and other management consultancy activities

71.12.Z - Engineering activities and related technical consultancy

71.20.B - Other technical testing and analysis

73.11.Z - Advertising agencies activities

73.12.B - Intermediation in the sale of the place on advertising aims in printed media

73.12.C - Intermediation in the sale of the place on advertising aims in electronic media (Internet)

73.12.D - Intermediation in the sale of the place on advertising aims in other media

73.20.Z - Market research and public opinion polling

74.10.Z - Specialised design activities

74.20.Z - Photographic activities

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