OECD (Organization for Economic Co-operation and Development)

OFA - The Association of Horticulture Professionals

OFRF - Organic Farming Research Foundation

Ohio Seed Improvement Association

Ohio State University

Oklahoma Seed Trade Association*

Oklahoma State University

Oliver Manufacturing Co.

OMRI (Organic Materials Review Institute)

Ontario Seed Growers’ Association

Oregon Seed Association

Oregon State University

Organic Seed Alliance

Organic Trade Association (OTA)

Oxford Nanopore Technologies Ltd