(education) Referring to exams in which external resources such as textbooks, glossaries, study notes, calculators, etc. may be used.

(education) Referring to an examination in which external resources such as glossaries, study notes, and calculators are prohibited.

(idiomatic) Something of which salient aspects are obvious or easily interpreted.

plural of open book decomposition

(mathematics, topology) A decomposition of a 3-manifold into a link and a fibration over the circle by surfaces bounded by that link.

A region of Singapore.

An ancient Egyptian funerary text of the New Kingdom consisting of spells to assist the journey of the dead into the afterlife, developed from the earlier Coffin Texts.

(idiomatic) To know all there is to be known about a certain discipline.

A book, often bound with a red cover, or online equivalent, that is an official, or canonical, collection of data, regulations, or writings.

Alternative spelling of bookkeeping