The set of settings related to the language and region in which a computer program executes. Examples are language, currency and time formats, character encoding etc.
A partially ordered set with the following additional axiomatic properties: any finite subset of it has a meet, any arbitrary subset of it has a join, and distributivity, which states that a binary meet distributes with respect to an arbitrary join. (Note: locales are just like frames except that the category of locales is opposite to the category of frames.)
The place where something happens.
A typically rectangular region representing the range or area currently visible (within a window, screen, etc.).
A viewing window.
To clip (an image or region) so that it fits in a viewport.