43.21.Z - Electrical installation
33.12.Z - Repair and maintenance of machinery
33.14.Z - Repair and maintenance of electrical equipment
33.20.Z - Installation of industrial machinery and equipment and outfit
42.22.Z - Works related to construction of telecommunications and electricity lines
43.29.Z - Other construction installation
43.99.Z - Other specialised construction activities not elsewhere classified
61.20.Z - Wireless telecommunications activities, excluding satellite telecommunications activities
62.01.Z - Computer programming activities
62.09.Z - Other information technology and computer service activities
72.19.Z - Other research and experimental development on natural sciences and engineering
72.20.Z - Research and experimental development on social sciences and humanities
80.20.Z - Security systems service activities
