IET can refer to: Organizations Institute of Educational Technology, part of the Open University Institution of Engineering and Technology, a UK-based professional engineering institution Institute of Engineers and Technicians, which became part of the Institution of Incorporated Engineers in 1998 (which then became part of the Institution of Engineering and Technology in 2006) Institute of Engineering and Technology of Lucknow, India University Institute of Engineering and Technology, Kanpur University of Kanpur, India, formerly known as IET Kanpur Institute of Engineering Technology, Sri Lanka, a Government higher education institute that providing NDES (National Diploma in Engineering Sciences) Award in Sri Lanka IET Bhaddal, an engineering institute based in Bhaddal, Punjab Islamic Educational Trust, Islamic organization in Nigeria Institute of Engineering and Technology, Ayodhya of Faizabad, Uttar Pradesh, India Persons iET (musician), a singer-songwriter from the Netherlands Processes Impulse excitation technique Initial Entry Training, the technical term for United States Army Basic Training Interval exchange transformation Interest Equalization Tax, an American tax initiative Other British Rail Class 800, British high-speed trains, known as Intercity Express Trains by their operator Great Western Railway Indole-3-ethanol or tryptophol, a chemical compound