International Stereoscopic UnionThe International Stereoscopic Union (ISU) was founded in 1975 and is the only international 3D association in the world. The ISU is a club of individual 3D enthusiasts as well as a club of stereo clubs. The ISU's members currently number more than 1,050 and come from over 40 countries world-wide.

3D-Photography, 3D Video Imaging, Computer Stereo, Digital Stereo Projection, Holography, Virtual Reality and all other stereoscopic photography techniques are used by members of the ISU.

Although the ISU caters mainly to the 3D amateur photographer, the ISU also has much to offer to members who are professional stereo photographers and cinematographers, as well as to those who are involved in the scientific aspects of the stereoscopic image.