OPTA
OPTA commonly identifies state‑level physical therapy associations—such as those in Ohio, Oregon, and Oklahoma—while the same acronym also appears for the Ohio Public Transit Association and an organic producers trade group.
Medical
Miscellaneous
Community
Oregon Permit Technicians Association
Oregon Physical Therapy Association
Ohio Public Transit Association
Governmental
Business
Organic Producers Trade Association
Oklahoma Physical Therapy Association
Ohio Physical Therapy Association
Orthotic Prosthetic Technological Association
Onafhankelijke Post en Telecommunicatie Autoriteit