National Assoc. of Industrial & Office Properties
http://www.naiop.org/index.cfm

The National Association of Industrial and Office Properties (NAIOP) is the nation's leading trade association for developers, owners, investors, asset managers and other professionals in industrial, office and mixed-use commercial real estate.

NAIOP is a national association with an extensive chapter network that represents the interests of developers, owners, asset managers, investors and other professionals involved in industrial, office and mixed-use real estate throughout North America. NAIOP provides communication, networking and business opportunities; creates a forum for continuing education; and promotes effective public policy, through its grassroots network, to create, protect and enhance property values.