Around 70% of these online theses are linked via the EThoS service, a further 15% via a choice of EThOS or the university repositories covered by EThOS, and the rest via university sources. Users link from the existing Index to Theses database entry, most of which (320,000 entries) include an abstract.
Where a thesis is not yet available online, Index to Theses describes alternative routes for obtaining the full text, whether by loan or digitisation. An explanation of the linking feature can be seen at: www.theses.com/obtain.html
Index to Theses has over 550,000 entries at the start of 2011. Over 16,000 new theses are added annually.