National Association of Theatre Owners
Worldwide trade organization.

Cineman In the Back Row
Worldwide underground and mainstream theater information and links. Also includes film festival details, movie sound files, and movie industry links.

The Front Row: Movie Projection Booth Information
Glossary of terms, information about digital sound and wide picture format, accompanied by photographs. Also contains information about how films are packaged and loaded into the projector, and links.

MovieSneak - The Movie Hopper's Guide
Former movie theater employee explains how to sneak into movies and how to theater hop with out getting caught.

Theaters for Sale
Centralized facility for the acquisition or divesture of middle and upper market motion picture houses.

The Mad Cornish Projectionist
Dedicated to projectors, projectionists and the cinema industry.

Rivest's Ultimate List of Movie Theaters
Lists indoor and drive-in theaters in the United States and Canada. The theater details are in downloadable Excel spreadsheets.