Bachelor's degree
Until the 19th century, a bachelor's degree represented the first degree in a particular faculty, with Arts representing undergraduate study, thus the Bachelor of Civil Law (BCL) at Oxford and the Bachelor of Laws (LLB) at Cambridge, for example, were postgraduate degrees. Vestiges of this system still remain in the ancient universities, with Oxford and Cambridge awarding BAs for undergraduate degrees in both arts and sciences (although both award undergraduate BTh degrees through associated theological colleges, and Oxford awards BFA degrees in addition to the BA) and defining other bachelor's degrees (e.g. BPhil, BCL) as postgraduate awards equivalent to master's degrees, although many postgraduate bachelor's degrees have now been replaced by equivalent master's degrees (e.g. LLM for the LLB at Cambridge and MSc for the BSc at Oxford). The same historical usage of indicating an undergraduate degree by it being in the faculty of arts rather than being a bachelor's degree gives rise to the Oxbridge MA and the Scottish MA).
Education in England
The typical first degree offered at English universities is the bachelor's degree with honours, which usually lasts for three years, although more vocational foundation degrees, typically lasting two years (or full-time equivalent) are also available in some institutions. Many institutions now offer an integrated master's degree, particularly in STEM subjects, as a first degree, which typically lasts for four years, the first three years running parallel to the bachelor's course. During a first degree students are known as undergraduates. The difference in fees between integrated and traditional postgraduate master's degrees (and that fees are capped at the first degree level for the former) makes taking an integrated master's degree as a first degree a more attractive option. Integrated master's degrees are often the standard route to chartered status for STEM professionals in England.