The Occupational Therapy Association of California (OTAC) was incorporated in 1976 as the result of the merging of the southern and northern California groups. It is a not-for-profit professional society designed to represent the nearly 10,000 occupational therapists (OTs) and occupational therapy assistants (OTAs) within all of California. We are membership driven and that is our main source of revenue. Our goal is to help assure the highest competency for the profession so that consumers may expect the highest level of service.