Foreword to the Special Section on the 23rd ACM symposium on virtual reality software and technology 2017

VRST is the top international symposium to see AR/VR/MR (XR) research results, systems, and techniques. VRST brings together the main international research groups working in XR. VRST is supported and joined by many of the world's leading XR companies. VRST enables XR researchers to interact, share new results, and show live demos. VRST event is sponsored by ACM SIGCHI and SIGGRAPH.