PEO

Peo may refer to:

• Reckong Peo, the capital of Kinnaur district in India

PEO may stand for:

• Parking enforcement officer
• Plasma electrolytic oxidation, a surface-treatment process for metals
• Polyethylene oxide, a polymer
• Old Persian language, per ISO 639-2 and ISO 639-3 standards
• Pancyprian Federation of Labour, an umbrella organization for trade unions in Cyprus
• P.E.O. Sisterhood, an international women's organization with headquarters in North America
• Professional employer organization, a service provider of outsourced human resource management
• Professional Engineers Ontario
• Program Executive Officer, an individual, civilian or military, responsible for large scale U.S. military acquisitions
• Progressive external ophthalmoplegia, a disease
• Programs Evaluation Office, a U.S. Defense Department covert mission in Laos
• Progressive External Ophthalmoplegia, a disease caused by mtDNA mutation

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