This is an amazing diagram of Geek Culture created by the people at FastCompany.
I do a similar type cluster when building a history for the world arena of a script. Whether you’re working on a story about lumberjacks or a script about Lesbian separatists, this is a terrific way to tackle a subject as an outsider when building an intricate social weave of a specialized culture.
For more detailed information about clustering and webbing, check out the Instant Character-Bio Technique found in How To Write a Screenplay in 10 Weeks.