The word "course" in American use typically refers to the study of a restricted topic or individual subject (for example, "a course in Early Medieval England", "a course in integral calculus") over a limited period of time (such as a semester or term) and is equivalent to a "module" or sometimes "unit" at a British university. In the UK, a "course of study" or simply "course" is likely to refer to the entire programme of study, which may extend over several years and be made up of any number of "modules," hence it is also practically synonymous to a degree programme. A few university-specific exceptions exist: for example, at Cambridge the word "paper" is used to refer to a "module", while the whole course of study is called "tripos".