Three major organizations in the United States are closely connected with the Myers-Briggs Type Indicator instrument. For contact information about organizations in other countries, please go to International Use.

• CPP, Inc., is the publisher and distributor of the MBTI instrument. This California-based company, which publishes other psychological instruments and products, also licenses international distribution and translations of the MBTI instrument. In addition, CPP, Inc., publishes (Davies-Black™) and markets products and materials related to the MBTI instrument and other instruments.

• Center for Applications of Psychological Type™, Inc. (CAPT®), is a not-for-profit organization that promotes MBTI research and the accurate understanding and ethical use of the Myers-Briggs Type Indicator instrument. CAPT maintains the Isabel Briggs Myers Memorial Library and the comprehensive MBTI Bibliography. This Florida-based organization, founded by Isabel Myers and Mary McCaulley, Ph.D., publishes and distributes books and materials about the MBTI instrument and other instruments.

• The Association of Psychological Type (APT), is a membership organization of professionals interested in personality type. APT schedules conferences, publishes The Bulletin of Psychological Type, supports regional and local chapters for members, and maintains interest-area coordinators for users of psychological type. APT also has links to international type organizations.