In business or commerce, an order is a stated intention, either spoken or written, to engage in a commercial transaction for specific products or services.
From a buyer's point of view it expresses the intention to buy and is called a purchase order.
From a seller's point of view it expresses the intention to sell and is referred to as a sales order.
In many businesses, orders are used to collect and report costs and revenues according to well-defined purposes.
There are five basic requirements for a contract to exist between two parties: agreement, voluntary, consideration, capacity, and legality.
(1) In this Article unless the context otherwise requires "contract" and "agreement" are limited to those relating to the present or future sale of goods.