EThOS is the electronic theses online service provided by the British Library.

The aim of EThOS is:

* To offer a 'single point of access' where researchers the world over can access ALL theses produced by UK Higher Education * To support Higher Education Institutions through the transition from print to e-theses * To help UK Higher Education Institutions expand available content by digitising paper theses * To demonstrate the quality of UK research and help attract students and research investment into UK HE

The service is in its early days and a lot of theses are not digitised as yet, but you can search across 250,000+ theses for free and order full text where a direct download link is not provided.