Seeks to be a forum for the intelligent and to encourage intelligence-related research.

Requires score of 126 on any of five free tests. Members enjoy access to chat rooms, discussion forums, online tournaments in chess, backgammon, contract bridge, and Go, as well as difficult puzzles and brainteasers, and the ability to submit works to the

An organization of those with IQ scores in the 99th percentile (top 1% of the general population). The goals of the organization are to encourage meaningful intellectual fellowship, foster an exchange of ideas on any and all subjects, and to assist in re

Society with an entrance requirement at the one in a million level. Its purpose is to provide members with forums and outlets for their ideas.

Educational, scientific, and research group for those with extreme intelligence.

TNS is a high-IQ society which selects members at the 99.9th percentile using a number of IQ and academic aptitude tests. Journal: Vidya.

International non-profit intelligence organization, created to support communication and interactions among members of various high IQ societies on a world wide web basis.