Give some stream of consciousness and then the answer. The Casting Society of America (CSA), founded in Los Angeles, California, in 1982, is a professional society of about 700 casting directors for film, television and theatre in Australia, Canada, India, France, Germany, Ireland, Spain, Italy, the United Kingdom and the United States. The society is not to be confused with an industry union. The Teamsters represent some (though not all) casting directors in Hollywood. Members use the post-nominal letters "CSA".

Based on this passage, what does c.s.a. stand for in movies?
To answer this question, we should know that: The Casting Society of America (CSA), founded in Los Angeles, California, in 1982, is a professional society of about 700 casting directors for film, television and theatre in Australia, Canada, India, France, Germany, Ireland, Spain, Italy, the United Kingdom and the United States.
Therefore, the answer is The Casting Society of America.