M- System Mariusz Szatkowski

43.21.Z - Electrical installation

33.13.Z - Repair and maintenance of electronic and optical equipment

33.14.Z - Repair and maintenance of electrical equipment

33.20.Z - Installation of industrial machinery and equipment and outfit

43.31.Z - Plastering

43.34.Z - Painting and glazing

43.39.Z - Other building completion and finishing

46.51.Z - Wholesale of computers, peripheral equipment and software

46.52.Z - Wholesale of electronic and telecommunications equipment and parts thereof

47.41.Z - Retail sale of computers, peripheral units and software in specialised stores

47.42.Z - Retail sale of telecommunications equipment in specialised stores

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

47.99.Z - Other retail sale not in stores, stalls or markets

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

80.20.Z - Security systems service activities

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

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