An order.
An urgent request.
The desire to purchase goods and services.
The amount of a good or service that consumers are willing to buy at a particular price.
A forceful claim for something.
A requirement.
More precisely peak demand or peak load, a measure of the maximum power load of a utility's customer over a short period of time; the power load integrated over a specified time interval.
To require of someone.
To claim a right to something.
To ask forcefully for information.
To request forcefully.
To issue a summons to court.
An order for goods or services placed in advance.
A binary relation that is reflexive and transitive.
To order (goods or services) in advance, before they are available.
To sort or arrange beforehand.
Such that, recursively, the root is visited before the left and right subtrees.