T-Com - Czech Telecom

Orange - T-Mobile – Vodafone - O2

Ministry of Interior SR – Ministry of Defence SR

Slovak Railways - Slovak road administration

E.ON – SSE regional electricity - VSE regional electricity - Hydro Power plants Trenčín

Vodohospodárska výstavba – Povodie Dunaja - Transpetrol – SPP Slovak gas industry

Kapsch – AT&T - – Telenor – Slovak academy of Sciences - Memorex Telex A.G. - Nokia – Siemens – Alcatel – Northern Telecom – Ericsson - TTC Marconi - Sky Toll a.s. - TOWERCOM a.s.