Degree abbreviations are used as an alternative way to specify an academic degree instead of spelling out the title in full, such as in reference books such as Who's Who and on business cards. Many degrees have more than one abbreviation. In the UK it is normal not to punctuate abbreviations for degrees with full stops (e.g. "BSc" rather than "B.Sc."), although this is done at some universities.
The Frameworks for Higher Education Qualifications of UK Degree-Awarding Bodies lays down five levels of qualification with the title of degree: foundation (not in Scotland), ordinary and honours bachelor's (only separate levels in Scotland), master's and doctoral. These relate to specific outcome-based level descriptors and are tied to the Bologna Process.
For historical reasons some universities (the ancient universities of England and Scotland) do not fully adhere to the Framework (particularly with respect to the title of Master of Arts), and degrees in medicine, dentistry, and veterinary medicine are titled as bachelor's degrees despite being at master's level.
The usage in the ancient universities is not consistent with the Framework or the Bologna Process. The ancient universities of England (Oxford and Cambridge) grant an MA degree that is not a substantive qualification but reflects the ancient practice of these universities of promoting BAs to MAs (and thus full membership of the University) a few years after graduating (see Master of Arts (Oxbridge and Dublin)). The ancient universities of Scotland award an undergraduate MA (see Scottish MA) instead of a BA.
The MAs from Aberdeen, Heriot-Watt, Glasgow, Edinburgh and St Andrews are considered bachelor's level qualifications on the Framework for Higher Education Qualifications and first cycle qualifications under the Bologna Process, while the Oxbridge MAs are considered "not academic qualifications" (the actual qualification being the BA).