- E&I stands for Electrical and Instrumentation (engineering)
- E&I stands for Engineering and Integration
- E&I stands for Entrepreneurship and Innovation (various schools)
- E&I stands for Engineering & Installation (US DoD)
- E&I stands for Environment & Infrastructure
- E&I stands for Erase and Install (software troubleshooting)
- E&I stands for Evaluation & Improvement
- E&I stands for Examination and Inventory (aircraft maintenance)
- E&I
- E&I stands for Enforcement and Intelligence Group (UK)
E&I