Learn what a Personal Identification Number (PIN ) is, its role in electronic transactions, and tips to enhance account security by using it effectively. PIN stands for personal identification number in its full form. PINs are secret codes that users create and use to authenticate themselves while trying to access a system. Mobile phones, laptops, desktops, and other devices and networks all employ PIN. PIN stands for Personal Identification Number . It is a secure numerical code created by the user and used for authentication when the user tries to access a system. For various types of systems and networks such as computer networks, mobile phones, etc. The PIN is used as a validation tool. PIN - Frequently Asked Questions What is the full form of PIN in Computing, Computer and Networking, Accounts and Finance, Military and Defence? Expand full name of PIN . What does PIN stand for? Is it acronym or abbreviation?