The term ORG. can refer to several different organizations. INST is an abbreviation for institution, which is a large and complex organization such as a university or hospital. CTR stands for center, which is a smaller organization that focuses on a specific purpose or mission. OAS is an acronym for organization of American States, which is an international organization that works to promote cooperation among its member countries in the Americas. SOC is an abbreviation for society, which is an organization of people who share a common interest or goal. ASSN is an abbreviation for association, which is an organization of people who come together to achieve a common purpose. SYST is an abbreviation for system, which is an organized set of principles or procedures according to which something is done. Finally, ASSOC is an abbreviation for association, which is a group of people organized for a joint purpose.