The American National Standards Institute (ANSI) has served in its capacity as administrator and coordinator of the United States' private sector voluntary standardization system for more than 80 years. Founded in 1918 by five engineering societies and three government agencies, the Institute remains a private, nonprofit membership organization supported by a diverse constituency of private and public sector organizations.

ANSI does not itself develop American National Standards (ANSs); rather it facilitates development by establishing consensus among qualified groups. The Institute ensures that its guiding principles -- consensus, due process, and openness -- are followed by the more than 175 distinct entities currently accredited under one of ANSI's three methods of accreditation (organization, committee, or canvass). In 1999 alone the number of American National Standards increased by nearly 5.5% to a total of 14,650 approved ANS. ANSI-accredited developers are committed to supporting the development of national and, in many cases international, standards addressing the critical trends of technological innovation, marketplace globalization, and regulatory reform.

Standard developers include:

• American Gas Association
• American Petroleum Institute
• Health Physics Society