To order, command, control.
To determine or decisively affect.
To speak in order for someone to write down the words.
An order or command.
To sort or arrange beforehand.
To order (goods or services) in advance, before they are available.
A binary relation that is reflexive and transitive.
An order for goods or services placed in advance.
Such that, recursively, the root is visited before the left and right subtrees.