The International Society of Appraisers (ISA) is a not for profit organization which provides education and organizational support to its members for the purpose of advancing the theory, principles and techniques of personal property appraising. Founded in the 1970ís, the organizationís mission is to advance the professionalism and effectiveness of personal property appraisers. The ISA serves the public by producing highly qualified and ethical appraisers who are recognized authorities in professional personal property appraising. One of the many functions of the organization is to provide member appraisers with guidance on how to conduct their appraisal business.