O
OCC - Office of the Comptroller of the Currency (bureau within the U.S. Treasury Department, originally established in 1863, which charters and supervises national banks and federal savings associations)
OCR - Office for Civil Rights (division within the Department of Health and Human Services given responsibility for enforcement of the Health Insurance Portability and Accountability Act (HIPAA) Privacy and Security Rules as a result of legislative changes created by the Health Information Technology for Economic and Clinical Health (HITECH) Act in 2009 - the Office of Civil Rights should not be confused with the Civil Rights Division of the Department of Justice, created to enforce the Civil Rights Act of 1957.)
OCR - optical character recognition (capability, usually through software, which can recognize printed or handwritten characters appearing as images on a piece of paper)
OCTAVE - Operationally Critical Threat, Asset, and Vulnerability Evaluation (method of risk assessment which is self-directed, allowing organizations to conduct their own information security risk evaluation)
OECD - Organization for Economic Cooperation and Development (official group of 34 nations, including most of the major industrialized countries, that was formed in 1961 to coordinate economic and social policies among its members and to promote economic assistance to developing countries)
OHCA - Organized Healthcare Arrangement (a joint arrangement where different health care providers provide services to common patients)
OIG - Office of the Inspector General (oversight body with the authority to review the actions of a federal agency)
ONC - Office of the National Coordinator for Health Information Technology (office created by executive order in 2004 and mandated under the Health Information Technology for Economic and Clinical Health (HITECH) Act which provides guidance on technology and data use relating to health information)
ONC-OCR - Office of the National Coordinator for Health Information Technology - Office for Civil Rights (HIPAA (Health Insurance Portability and Accountability Act) Security toolkit, available from the Office for Civil Rights, designed to help organizations assess their compliance with the HIPAA Security Rule)
OWASP - Open Web Application Security Project (standards-setting organization promoting Internet security)