In the social sciences a social group has been defined as two or more humans who interact with one another, share similar characteristics and collectively have a sense of unity.[1] Other theorists, however, are a wary of definitions which stress the importance of interdependence or objective similarity.[2][3] Instead, for researchers in the social identity tradition "a group is defined in terms of
those who identify themselves as members of the group".[4] Regardless, social groups come in a myriad of sizes and varieties. For example, a society can be viewed as a large social group. A trade association, also known as an industry trade group, business association or sector association, is an organization founded and funded by businesses that operate in a specific industry. An industry trade association participates in public relations activities such as advertising, education, political donations, lobbying and publishing, but its main focus is collaboration between companies, or standardization. Associations may offer other services, such as producing conferences, networking or charitable events or offering classes or educational materials. Many associations are non-profit organizations governed by bylaws and directed by officers who are also members.