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A personal identification number (PIN; sometimes redundantly a PIN code or PIN number) is a numeric (sometimes alpha-numeric) passcode used in the process of authenticating a user accessing a system. The PIN has been the key to facilitating the private data exchange between different data-processing centers in computer networks for financial ...
Paleolithic: Sơn Vi culture: 20,000 BC–12,000 BC: Mesolithic: Hoabinhian: 12,000 BC–10,000 BC: Neolithic: Bắc Sơn culture: 10,000 BC–8,000 BC: Quỳnh Văn ...