Norsk Hydro started out their Virtual Reality research activity in 1997 developing an in-house<br>application in collaboration with Christian Michelsen Research. The application was sold and<br>commercialized by Schlumberger, known as Inside Reality, but development has separated<br>the two applications. In HydroVR important application tools were developed in tight<br>collaboration with the users securing a tight linkage to the daily workflows. The development<br>and use of HydroVR has been regarded as a success, but have been mainly used by<br>Production and Research.