| Acronym | Definition |
|---|
| QEC | Quality Enhancement Cell (Pakistan) |
| QEC | Quantum Error Correction |
| QEC | Questerre Energy Corp. (Canada) |
| QEC | Quarantine Enforcement Client |
| QEC | Quick Engine Change |
| QEC | Quality Environmental Containers, Inc. (Beaver, WV) |
| QEC | Quod Erat Constructum (Latin: as was asked to be constructed) |
| QEC | Quebec English Corpus (Quebec, Canada) |
| QEC | Quaternary Environmental Change (UK) |
| QEC | Quick Easy Contact (email marketing tool) |
| QEC | Quadrantal Error Correction |
| QEC | Quantum Erasure Channel |
| QEC | Query Engine/Chassis Number (police incident code; New Zealand) |