DEFINITION of 'Warranty'. A type of guarantee that a manufacturer or similar party makes regarding the condition of its product. It also refers to the terms and situations in which repairs or exchanges will be made in the event that the product does not function as originally described or intended. Next Up.
RSA is an algorithm used by modern computers to encrypt and decrypt messages. It is an asymmetric cryptographic algorithm.
RMA stands for Return Merchandise Authorization. It's a way for the company to be able to know why the item is being returned and arrange for proper shipping of the own back to them. Many companies have customers ship the items back to then I'd the customer wants a refund or replacement.