| PEO | Pacific Economic Outlook 
| Others |
| PEO | Papa Eats Out
| Others |
| PEO | Peace Enforcement Operations
| Others |
| PEO | Performing Engineering Operations
| Others |
| PEO | Persian, Old (ca. 600 - 400 B. C.)
| Others |
| PEO | Personal Entertainment Organizer
| Others |
| PEO | Philanthropic and Educational Organization
| Others |
| PEO | Philanthropic Educational Organizantion
| Others |
| PEO | Philanthropic Educational Organization
| Others |
| PEO | Plant Exchange Office
| Others |
| PEO | Plasma Electrolytic Oxidation
| Others |
| PEO | Poly Ethylene Oxide
| Others |
| PEO | PolyEthylene Oxide
| Others |
| PEO | Pre Engineered Options
| Others |
| PEO | Predictive Energy Optimisation
| Others |
| PEO | Presidents of Enterprising Organizations
| Others |
| PEO | Primer Estado Oculto
| Others |
| PEO | Product Engineering Office
| Others |
| PEO | Product Engineering Optimizer
| Others |
| PEO | Professional Employee Organization
| Others |
| PEO | Professional Employer Organization
| Others |
| PEO | Professional employer organizations
| Others |
| PEO | Professional Employment Organization
| Others |
| PEO | Professional Engineers Ontario
| Others |
| PEO | Program Evaluation Office
| Others |
| PEO | Program Executive Office
| Others |
| PEO | Program Executive Officer
| Others |
| PEO | Project Evaluation Objectives
| Others |
| PEO | Public Enquiry Office
| Others |