The work has comprised development of a low cost multiuser VR, Virtual Reality, system. The system can import CAD models in DXF format. These models can later be commented on and edited in a common 3D model by several (two now) users. The users in the 3D virtual room are represented by geometrical model persons to enhance user collaboration in real time. Many VR libraries have been evaluated and tested. The development work has been done using Borland Delphi and Watcom C++ and the Renderware 1.4 VR library from Criterion Software. User communication is supported by the TCP/IP protocol. This protocol has been implemented with Dwinsock 1.4.