FightingDirectory.info is a great resource containing links related to Chinese martial arts, Korean martial arts, Japanese martial arts, martial arts services, aikido, karate, taekwando, muay thai, chung moo doe, tang soo do and more.
American Tang Soo Do Karate
A style of Korean martial art based on Moo Duk Kwan in Glenside, PA, just outside of Philadelphia. Video clips of self-defense and sparring are available, as well as terminology and other materials.
http://www.atsdkarate.com
International Tang Soo Do Federation (ITF) school in Tampa, Florida. Certified Instructors under Grand Master CS Kim. Teaching Traditional Tang Soo Do Karate. Includes events, gallery, schedule, and contact information. Also offers aerobic kick boxing.
A member studio of the World Tang Soo Do Association with classes offered in Coatesville and Downingtown, Pennsylvania. Includes information on programs, classes, locations, links and contact information.