For member institutions of the Association of Commonwealth Universities, there is a standard list of abbreviations for university names given in the Commonwealth Universities Yearbook, but in practice many variations are used and the Yearbook notes that the abbreviations used may not match those used by the universities concerned. For some British universities it is traditional to use Latin abbreviations, notably 'Oxon' and 'Cantab' for the universities of Oxford and Cambridge respectively, in spite of these having been superseded by English 'Oxf' and 'Camb' in official university usage, particularly in order to distinguish the Oxbridge MA from an earned MA. Other Latin abbreviations commonly used include 'Cantuar' for Lambeth degrees (awarded by the Archbishop of Canterbury), 'Dunelm' for Durham University, 'Ebor' for the University of York and 'Exon' for the University of Exeter. The Ancient universities of Scotland and the University of London have abbreviations that are the same in English and Latin. (See for a more complete list and discussion of abbreviations for British universities.)