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BCL) as postgraduate awards equivalent to master's degrees, although many postgraduate bachelor's degrees have now been replaced by equivalent master's degrees (e.g. LLM for the LLB at Cambridge and MSc for the BSc at Oxford).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).
Undergraduate education
In many other, particularly continental European systems, an "undergraduate" degree in the American sense does not exist. Because students are expected to have received a sound general education at the secondary level, in a school such as a gymnasium or lycee, students in Europe enroll in a specific course of studies they wish to pursue upon entry into a University. In the US, students only specialize in a "major" during the last years of college. Specializing in a field of study upon entry into a university means most students graduate after four to five years of study. The fields available include those only taught as graduate degrees in the US, such as law or medicine.