| Acronym | Definition |
|---|
| PEC | Professional Education Center |
| PEC | Prince Edward County |
| PEC | Proposta de Emenda à Constituição (politics, Brazil) |
| PEC | Piedmont Environmental Council (Virginia) |
| PEC | PharmacoEconomic Center (US DoD) |
| PEC | Predicted Environmental Concentration |
| PEC | Personal Effects Coverage (Insurance) |
| PEC | Pacific Energy Center |
| PEC | Periodic Error Correction |
| PEC | Pakistan Engineering Council |
| PEC | Punjab Engineering College (Chandigarh, India) |
| PEC | Placements Épargne Canada (Canada investment savings) |
| PEC | President's Export Council |
| PEC | Perfect Electric Conductor |
| PEC | Plain English Campaign |
| PEC | Pulsed Eddy Current (inspection tool) |
| PEC | Primary Energy Consumption |
| PEC | Physical Education Center (Emory University) |
| PEC | Pondicherry Engineering College (Pondicherry, India) |
| PEC | Petroleum Energy Center (Japan) |
| PEC | Peace Education Commission |
| PEC | Proposal Evaluation Committee |
| PEC | Progress Energy Carolinas, Inc. |
| PEC | Polyelectrolyte Complex |
| PEC | Proximity–Effect Correction |
| PEC | Photoelectrochemistry |
| PEC | Product Engineering Center |
| PEC | Probable Effect Concentration (toxicology) |
| PEC | Program Element Code |
| PEC | Polymer Engineering Center |
| PEC | Protestant Episcopal Church |
| PEC | Professional Engineers in Construction (division of NSPE) |
| PEC | Pan-European Crossing |
| PEC | Professional Engineering Consultants, Inc. |
| PEC | Pearson Education Canada |
| PEC | Palestinian Energy and Environment Research Center |
| PEC | Personal Equipment Connector |
| PEC | Potential Energy Curve |
| PEC | Product Engineering Code |
| PEC | Public Education Coalition |
| PEC | Priesthood Executive Committee |
| PEC | Professional Electrical Contractor |
| PEC | Program Evaluation Center |
| PEC | Parallel Earth Conductor |
| PEC | Philippine Electrical Code |
| PEC | Pure Entertainment Company |
| PEC | Project Entropia Cent (gaming, MMORPG) |
| PEC | Professional Eligibility Certificate |
| PEC | Passive Experiment Carrier (MEEP, NASA) |
| PEC | Program Execution Client |
| PEC | Philippine Episcopal Church |
| PEC | Public Education Council (Australia) |
| PEC | Programas de Concurrencia |
| PEC | Passive Equipment Cabinet |
| PEC | Preferred Equity Certificate |
| PEC | Production Equipment Code |
| PEC | Plant Equipment Code |
| PEC | Professional Engineering Corporation (Fairfax, Virginia) |
| PEC | Profiling E. coli Chromosome |
| PEC | Photo Electronics Corp |
| PEC | Power Electronics Council |
| PEC | Pulchowk Engineering College (Kathmandu, Nepal) |
| PEC | Protective Electronic Circuit (electronics) |
| PEC | Product Equipment Code (Nortel) |
| PEC | Prion Expert Committee (Japan) |
| PEC | Part Evaluation Cycle |
| PEC | Primary Equipment Custodian |
| PEC | Printed Electrical Circuit |
| PEC | Physics Emotion Cognition (software agent traits) |
| PEC | Personal Exposure Concentration (chemicals) |
| PEC | Pentagon Episcopal Community |
| PEC | Previously Enjoyed Companion |
| PEC | PEOC3S Executive Committee |
| PEC | Parmelee Enterprises Corporation |
| PEC | Pulse Envelope Correlation |
| PEC | Promotion and Education Committee |
| PEC | Platform Evaluation Confidence |
| PEC | Progressive Educational Complex (Karachi, Pakistan) |
| PEC | Primitive Episcopal Church |
| PEC | Passive Equipment Center |
| PEC | Passive Equipment Console |
| PEC | Parramatta Education Centre (Australia) |