Krzysztof Bolczak

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

26.11.Z - Manufacture of electronic components

26.12.Z - Manufacture of electronic printed circuits

26.30.Z - Manufacture of(tele)communication equipment

27.90.Z - Manufacture of other electrical equipment

61.10.Z - Wired telecommunications activities

61.20.Z - Wireless telecommunications activities, excluding satellite 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

74.20.Z - Photographic activities

95.11.Z - Repair and maintenance of computers and peripheral equipment

95.12.Z - Repair and maintenance of (tele)communication equipment