71.12.Z - Engineering activities and related technical consultancy
42.22.Z - Works related to construction of telecommunications and electricity lines
43.21.Z - Electrical installation
47.99.Z - Other retail sale not in stores, stalls or markets
62.01.Z - Computer programming activities
62.02.Z - Computer consultancy activities
62.09.Z - Other information technology and computer service activities
72.19.Z - Other research and experimental development on natural sciences and engineering