O

• Old-Age and Survivors’ Insurance (Switzerland)
• Occupational Safety and Health Administration (USA)
• Organisation of Working Time Regulations, 2001 (Ireland)
• Organization for Self-Employed (Greece)
• Organisation of Working Time Act, 1997 (Ireland)
• OF
• Office of Disability Employment Policy (USA)
• Office of Federal Contract Compliance Programs (USA)
• Occupational Health and Safety Management System (Colombia)
• Office of Workers Compensation Programs (USA)
• OBWF/OBW/OW
• OSH Act of 1970 (USA)
• Office of Labor-Management and Standards (USA)