IOD may refer to:

• International One Design - A 33-foot day sailboat designed in the 1930s
• Indian Ocean Dipole
• Institute of Directors
• Integrated Optical Density - used in LabWorks Analysis Software

The Institute of Directors (IoD) is a business organisation for company directors, senior business leaders and entrepreneurs. It is the UK’s longest running organisation for professional leaders, having been founded in 1903 and incorporated by Royal Charter in 1906. The IoD, per its mission statement, stands for "free enterprise, entrepreneurialism, wealth creation and good corporate governance," and represents "the views of businesses and IoD members in the media and with government."

IOD may refer to:

• International One Design - A 33-foot day sailboat designed in the 1930s
• Indian Ocean Dipole
• Institute of Directors
• Integrated Optical Density - used in LabWorks Analysis Software

The Institute of Directors (IoD) is a business organisation for company directors, senior business leaders and entrepreneurs. It is the UK’s longest running organisation for professional leaders, having been founded in 1903 and incorporated by Royal Charter in 1906. The IoD, per its mission statement, stands for "free enterprise, entrepreneurialism, wealth creation and good corporate governance," and represents "the views of businesses and IoD members in the media and with government."