Editing CSA (section)

===Professional and trade organizations and unions===
* [[Autonomous Trade Unions Centre]] (Central des Syndicats Autonomes du Bénin), a trade union centre in Benin
* [[California Society of Anesthesiologists]]
* [[CarSharing Association]], a federation of carsharing organizations
* [[Casting Society of America]], acronym commonly seen in the beginning and ending credits of media programs
* [[Central Student Association]], University of Guelph, Ontario, Canada
* [[Civil Service Alliance]], former British trade union federation
* [[Civil Service Association]], Trinidad and Tobago
* [[Chemical Abstracts Service]], a division of the American Chemical Society
* [[Cloud Security Alliance]], which promotes IT security best practices
* [[College Student Alliance]], a federation of student unions, based in Ontario, Canada
* [[Council of School Supervisors & Administrators]], a New York City-based trade union
* [[Czech Society of Actuaries]]