A preordering of an expression tree is the expression in Polish notation.

A preordering is a list of the vertices in the order that they were first visited by the depth-first search algorithm.

Every commutative monoid can be endowed with its algebraic preordering .

By preordering the album from Matador Records or iTunes, listeners could receive the single as a download that day.

A prepositive cone or preordering of a field F is a subset P F that has the following properties:

Of course, this was usually only a two- or three-minute warning, so the preordering was necessary both because of the short warning and in the rather common event that she didn't bother to call at all.

Immediately following the announcement of the decision to release the book, it became an active topic in personal blogs, 2channel and other message boards, and movements calling for the preordering or purchase of the book developed.