A personal identification number (PIN), or sometimes redundantly a PIN number, is a numeric or alphanumeric passcode used in the process of authenticating a user accessing a system.. The personal identification number has been the key to flourishing the exchange of private data between different dataprocessing centers in computer networks for financial institutions, governments, and enterprises.A pin is a device used for fastening objects or material together, and can have three sorts of body a shaft of a rigid inflexible material meant to be inserted in a slot, groove, or hole (as with pivots, hinges, and jigs); a shaft connected to a head and ending in a sharp tip meant to pierce one or more pieces of soft materials like cloth or paper (the straight or push pin); a single strip of ...
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