AEA - Actors Equity Association http://www.actorsequity.org/home.html

ASTC - American Society of Theatre Consultants http://www.theatreconsultants.org/

ESTA - Entertainment Services and Technology Association http://www.esta.org/

IATSE - IATSE International http://www.iatse.lm.com/index.html
IATSE National Directory http://www.iatse.lm.com/usdirect.html

MSFB - Minnesota State Film Board http://www.mnfilm.org/

SETC - Southeastern Theatre Conference http://www.setc.org/

TCG - Theatre Communications Group http://www.tcg.org/

U/RTA - University/Resident Theatre Association http://www.urta.com

USAA - Unites Scenic Artists http://frontpage1.shadow.net/usa829fl/http://usa89.org

USITT - United States Institute for Theatre Technology http://www.usitt.org/

USITT Northern Boundary Section http://www.northernboundary.usitt.org/