IET
- British Rail Class 800
- British Rail Class 802
- Great Western Railway (train operating company)
- IET Bhaddal
- Impulse excitation technique
- Initial Entry Training
- Institute of Engineering Technology, Sri Lanka
- Institute of Engineering and Technology
- Institute of Engineering and Technology, Ayodhya
- Institution of Engineering and Technology
- Interest Equalization Tax
- Interval exchange transformation
- Islamic Educational Trust
- Open University
- University Institute of Engineering and Technology, Kanpur University