Institute of Real Estate Management
http://www.irem.org/National Multi Housing Council
The largest apartment association in the U.S.
http://www.nmhc.org/National Network of Commercial Real Estate Women
NNCREW is dedicated to furthering the success of its members by providing opportunities that foster productive and supportive relationships, and enhance personal and professional growth.
Office Business Center Association International (OBCAI) is the nonprofit trade association for the Office Business Center Industry. With over 600 member locations worldwide, our member Office Business Centers provide an array of services to their clients.
http://www.obcai.org/Real Estate Board of New York
REBNY's membership consists of the major office and residential property owners and builders, brokers and managers; banks, financial service companies, utilities, attorneys, architects, contractors and other individuals and institutions professionally interested in Manhattan real estate.
http://www.rebny.com/Real Estate Investment Advisory Council
A national nonprofit trade association, that provides an open forum for the exchange of ideas, concerns and experiences between people who conduct commercial real estate transactions.
http://www.reiac.org/Real Estate Research Institute
High quality research on real estate investment performance and market fundamentals.
Society of Industrial and Office Realtors
http://www.sior.com/National Association of Industrial and Office Properties
The Intersection of Commercial Real Estate, Corporate Real Estate and Technology
National Association of Realtors - Commercial
National Network of Commercial Real Estate Women
Association of Commercial Real Estate