Piotr Zakrzewski

70.22.Z - Business and other management consultancy 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

64.99.Z - Other financial service activities, except insurance and pension funding not elsewhere classified

68.20.Z - Rental and operating of own or leased real estate

70.21.Z - Public relations and communication activities

72.20.Z - Research and experimental development on social sciences and humanities

73.11.Z - Advertising agencies activities

74.10.Z - Specialised design activities

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

82.30.Z - Organisation of conventions and trade shows