bawl definition: To bawl is defined as to cry or wail loudly. (verb) An example of bawl is to sob loudly upon hearing bad news. ...
Legality: A contract is a legal document and a PO is a commercial document. To elaborate, a PO is an offer from the buyer to the supplier. If accepted by the supplier (within a reasonable timeframe) the PO becomes a contract. Logically, this PO will have zero value if it's not accepted by the supplier.
The big difference between a warranty and a service contract is the cost. A warranty is something that a manufacturer includes as part of the purchase price of the item. service contract is like a warranty except that it is an additional item that you purchase separate from the commodity it covers. Many companies call it an extended warranty. The service contract adds to the level of protection that you get on top of your regular warranty.