69.20.Z - Accounting, bookkeeping and auditing activities; tax consultancy
63.11.Z - Data processing, hosting and related activities
70.22.Z - Business and other management consultancy activities
73.11.Z - Activities of advertising agencies
73.12.B - Intermediation in the sale of the place on advertising aims in printed media
73.12.C - Intermediation in the sale of the place on advertising aims in electronic media (internet)
73.12.D - Intermediation in the sale of the place on advertising aims in other media
82.30.Z - Organisation of conventions and trade shows