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  2. Personal unblocking key - Wikipedia

    en.wikipedia.org/wiki/Personal_unblocking_key

    A personal unblocking key ( PUK ), sometimes called personal unblocking code ( PUC ), is used in SIM cards to reset a personal identification number (PIN) that has been lost or forgotten. Most mobile phones offer the feature of PIN protection. After switching on the phone, if the PIN security function is active, the user is required to enter a ...

  3. Motorola 6809 - Wikipedia

    en.wikipedia.org/wiki/Motorola_6809

    The Motorola 6809 (" sixty-eight-oh-nine ") is an 8-bit microprocessor with some 16-bit features. It was designed by Motorola 's Terry Ritter and Joel Boney and introduced in 1978. Although source compatible with the earlier Motorola 6800, the 6809 offered significant improvements over it and 8-bit contemporaries like the MOS Technology 6502 ...

  4. Universal asynchronous receiver-transmitter - Wikipedia

    en.wikipedia.org/wiki/Universal_asynchronous...

    A universal asynchronous receiver-transmitter ( UART / ˈjuːɑːrt /) is a peripheral device for asynchronous serial communication in which the data format and transmission speeds are configurable. It sends data bits one by one, from the least significant to the most significant, framed by start and stop bits so that precise timing is handled ...

  5. What’s a Personal Identification Number (PIN) - AOL

    www.aol.com/finance/personal-identification...

    An individual’s PIN is the four-digit code they set after opening a debit account with their bank of choice. It is used as a layer of authentication when they perform an electronic transaction ...

  6. Security token - Wikipedia

    en.wikipedia.org/wiki/Security_token

    A security token is a peripheral device used to gain access to an electronically restricted resource. The token is used in addition to, or in place of, a password. [ 1] Examples of security tokens include wireless key cards used to open locked doors, a banking token used as a digital authenticator for signing in to online banking, or signing ...

  7. Personal identification number - Wikipedia

    en.wikipedia.org/wiki/Personal_identification_number

    A personal identification number ( PIN ), PIN code, or sometimes redundantly a 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 ...

  8. Use Face, Fingerprint or PIN to sign in to AOL - AOL Help

    help.aol.com/articles/use-face-fingerprint-or...

    Call live aol support at. 1-800-358-4860. Get live expert help with your AOL needs—from email and passwords, technical questions, mobile email and more.

  9. Peripheral Interface Adapter - Wikipedia

    en.wikipedia.org/wiki/Peripheral_Interface_Adapter

    The Peripheral Interface Adapter had a slight change in the electrical characteristics of the I/O pins so the MC6820 became the MC6821. [1] The MC6820 was used in the Apple I to interface the ASCII keyboard and the display. [2] It was also deployed in the 6800-powered first generation of Bally electronic pinball machines (1977-1985), such as ...