The IET Digital Library is a global repository of science, engineering and technology focused content produced by the world?s leading international scientific organisation and thought leader ? the IET. Online access to the IET Digital Library unlocks an unsurpassed body of work of more than 174,000 technical papers and around 8,676 eBook chapters from 1994 onwards for all IET journals, magazines, conference publications and seminar digests. Approximately 450 new documents are added to the IET Digital Library each month and this number will increase as we introduce ?article by article? publishing, ensuring that articles are available to subscribers at the earliest opportunity, without having to wait for the fully published journal issue to be made available online. The Journal of Engineering, the IET's broad-based open access research journal has recently launched and will contain a range of inter-disciplinary, peer-reviewed articles that are free to view.