Professional Organizations:
Association of College Unions International	ACUI	http://www.acui.org/
Association of Experiential Educators	AEE	http://www.aee.org/
American Camping Association	ACA	http://www.acacamps.org/
American Canoe Association	ACA	http://www.acanet.org/
American College of Sports Medicine	ACSM	http://www.acsm.org/
Leave No Trace	LNT	http://www.lnt.org/
National Council on Therapeutic Recreation Certification	NCTRC	http://www.nctrc.org/
National Recreation and Park Association	NRPA	http://www.nrpa.org/
National Intramural Recreation and Sports Association	NIRSA	http://www.nirsa.org/
Resort and Commercial Recreation Association	RCRA	http://www.rcra.org/
Wilderness Education Association	WEA	http://www.weainfo.org/
Career and Internship Opportunities:
American Camping Association	ACA	http://www.acacamps.org/jobs/
Recreation Therapy Directory	TRD	http://www.recreationtherapy.com/rt.htm
Student Conservation Association	SCA	http://www.thesca.org/
State Recreation and Parks Associations:
Missouri Parks and Recreation Association	MPRA	http://www.mopark.org/
National and State Affiliates of National Recreation and Park Association (lists all state organizations)	NRPA	http://www.nrpa.org/stateassociations/