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Definition: pin


(1) The male lead on a chip or cable connector. Each pin plugs into its female counterpart to complete the circuit. The number of pins reflects the number of wires/pathways that carry signals. See plugs and sockets.

(2) (PIN) (Personal Identification Number) An abbreviated password from four to six digits. The PIN is used to authenticate users at ATM machines and debit card terminals, as well as an option on mobile devices in lieu of a password or biometric method. See passcode and password.

(3) To place an object onto a start menu, taskbar or home screen. For example, in Windows, "Pin to Taskbar" places the application icon onto the taskbar. The Mac equivalent is "Keep in Dock." See Pinterest.

(4) In Android devices starting with Version 5.0, "Pin windows" is a feature that keeps a single app on screen. For example, when passing the phone around to show photos, pinning the photo viewer app prevents people from accidentally opening another app or reverting to the home screen.

(5) (PIN) (Processor Independent NetWare) A version of NetWare 4.1 designed for portability to multiple platforms. Development was stopped in early 1995.