Oxford Opportunity Bursaries, introduced in 2006, are university-wide means-based bursaries available to any British undergraduate, with a total possible grant of £10,235 over a 3-year degree. In addition, individual colleges also offer bursaries and funds to help their students. For graduate study, there are many scholarships attached to the university, available to students from all sorts of backgrounds, from Rhodes Scholarships to the relatively new Weidenfeld Scholarships. Oxford also offers the Clarendon Scholarship which is open to graduate applicants of all nationalities. The Clarendon Scholarship is principally funded by Oxford University Press in association with colleges and other partnership awards. In 2016, Oxford University announced that it is to run its first free online economics course as part of a "massive open online course" (Mooc) scheme, in partnership with a US online university network. The course available is called 'From Poverty to Prosperity: Understanding Economic Development'. Students successful in early examinations are rewarded by their colleges with scholarships and exhibitions, normally the result of a long-standing endowment, although since the introduction of tuition fees the amounts of money available are purely nominal. Scholars, and exhibitioners in some colleges, are entitled to wear a more voluminous undergraduate gown; "commoners" (originally those who had to pay for their "commons", or food and lodging) are restricted to a short, sleeveless garment. The term "scholar" in relation to Oxford therefore has a specific meaning as well as the more general meaning of someone of outstanding academic ability. In previous times, there were "noblemen commoners" and "gentlemen commoners", but these ranks were abolished in the 19th century. "Closed" scholarships, available only to candidates who fitted specific conditions such as coming from specific schools, were abolished in the 1970s and 1980s. Libraries The university maintains the largest university library system in the UK, and, with over 11 million volumes housed on of shelving, the Bodleian group is the second-largest library in the UK, after the British Library. The Bodleian is a legal deposit library, which means that it is entitled to request a free copy of every book published in the UK. As such, its collection is growing at a rate of over three miles (five kilometres) of shelving every year. The buildings referred to as the university's main research library, The Bodleian, consist of the original Bodleian Library in the Old Schools Quadrangle, founded by Sir Thomas Bodley in 1598 and opened in 1602, the