Wikipedia
SIGCHI is the Special Interest Group on Computer–Human Interaction, one of the Association for Computing Machinery's special interest groups. It is the world's leading organization in Human–Computer Interaction (HCI), and essentially created and defined the field.
It hosts the major annual international HCI conference, CHI, with around 2,500 attendees, and publishes two of the main international publications on HCI: ACM Interactions, and ACM Transactions on Computer-Human Interaction (TOCHI).
It was formed in 1982 by renaming and refocussing SIGSOC, the Special Interest Group on Social and Behavioral Computing; Lorraine Borman, previously editor of the SIGSOC Bulletin, was its first chair.
SIGCHI has two membership publications, the SIGCHI Bulletin and interactions.
Each year it inducts around 7 or 8 people into the CHI Academy, honouring them for their significant contribution to the field of human–computer interaction. It also gives out a CHI Lifetime Achievement Award for research and practice, the CHI Lifetime Service Award, and the CHI Social Impact Award. Past recipients of these awards are listed on the SIGCHI website.