OPIS hsa served a variety of clients, including:

American Academy of Family Physicians

American Association of Dental Plans

American Retailers Association

American Society for Breast Disease

American Society for Parenteral and Enteral Nutrition

American Society of Anesthesiologists

American Society of Plastic Surgeons

American Water Resource Associaiton

AMVETS

ASAE and The Center for Association Leadership

Association for Career and Technical Education

British Columbia Medical Association

Canadian Medical Association

Children Affected by AIDS Foundation (CAAF)

Independent Insurance Agents of Texas

Institute of Real Estate Management: Dallas Chapter

International Facility Management Association

International Order of the Golden Rule

Michigan Dental Association

Michigan Library Association

Michigan Restaurant Association

Michigan Society of Association Executives

Missouri Dental Association

National Association of the Gifted and Talented

National Cattlemen’s Beef Association

Ohio Certified Public Accountants

Restaurant Association of Maryland

Texas Association of the Gifted and Talented

Texas Hospital Association

Texas Society of Association Executives

Texas Society of Counties

Texas Society of School Business Officials

The Electronic Transactions Association

The National Court Reporters Association

Tree Care Industry Association