ACM SIGCHI | 4,173 followers on LinkedIn. SIGCHI is the premier international society for professionals, academics, and students who are interested in HCI. | SIGCHI is the premier international society for professionals, academics and students who are interested in human-technology and human-computer interaction (HCI). We provide a forum for the discussion of all aspects of HCI through our 26 sponsored and over 40 in-cooperation conferences, publications (eg. OpenTOC: Table of Contents page), communities, web sites, email discussion groups, and other services.