zSpace, Inc. is an American technology firm based in San Jose, California that combines elements of virtual and augmented reality in a computer. zSpace mostly provides AR/VR technology to the education market. It allows teachers and learners to interact with simulated objects in virtual environments. zSpace does not require the use of a head-mounted display. Users experience 3D content through a 3D computer screen, aided by head-tracking technology and a stylus. The hardware switches between the left and right images through a circularly polarized light that enters the eye. In some models, eyewear contains small reflective tabs that the computer uses to track where users are looking. Other models are equipped with head tracking technology and do not require any glasses or eyewear. Paul Kellenberger is the company's current CEO and president. Wikipedia