The Institution of Engineering and Technology (IET) is the world's leading professional organisation for engineering and technology, with 154,000 members in 148 countries. IET is headquartered in London, United Kingdom, and has offices in the United States, China and India. Worldwide, IET has more than 250 corporate partners, such as world-renowned Microsoft, Intel, Cisco, IBM, ABB, Schneider, BP, British Telecom, BAE Systems, etc.