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  3. Grille (cryptography) - Wikipedia

    en.wikipedia.org/wiki/Grille_(cryptography)

    A crossword grid taken from a 1941 newspaper. The distribution of grilles, an example of the difficult problem of key exchange, can be eased by taking a readily-available third-party grid in the form of a newspaper crossword puzzle. Although this is not strictly a grille cipher, it resembles the chessboard with the black squares shifted and it ...

  4. Keypunch - Wikipedia

    en.wikipedia.org/wiki/Keypunch

    The IBM 056 verifier used most of the same mechanical and electrical components as the 024/026 keypunches with the exception of the punch unit and print head. The punch unit had sensing pins in place of the punches. The holes sensed or not sensed would trip a contact bail when the configuration was other than that entered by the verifier operator.

  5. Punch (tool) - Wikipedia

    en.wikipedia.org/wiki/Punch_(tool)

    A punch is a tool used to indent or create a hole through a hard surface. They usually consist of a hard metal rod with a narrow tip at one end and a broad flat "butt" at the other. When used, the narrower end is pointed against a target surface and the broad end is struck with a hammer or mallet , causing the blunt force of the blow to be ...

  6. Hole punch - Wikipedia

    en.wikipedia.org/wiki/Hole_punch

    A related office tool is the eyelet punch. This is a single-hole punch which also crimps a metal fastening loop around the hole, similar to a rivet. It is used to permanently secure a few sheets of paper together. A similar tool, generally known as a holing pincer, is used in animal husbandry.

  7. Play Simply Jigsaw Online for Free - AOL.com

    www.aol.com/games/play/masque-publishing/simply...

    Piece together a new jigsaw puzzle every day, complete with themes that follow the seasons and a super useful edges-only tool. Play Simply Jigsaw Online for Free - AOL.com Skip to main content

  8. Hole punching (networking) - Wikipedia

    en.wikipedia.org/wiki/Hole_punching_(networking)

    To punch a hole, each client connects to an unrestricted third-party server that temporarily stores external and internal address and port information for each client. The server then relays each client's information to the other, and using that information each client tries to establish direct connection; as a result of the connections using ...

  9. Knockout punch - Wikipedia

    en.wikipedia.org/wiki/Knockout_punch

    In metalworking, a knockout punch, also known as a chassis punch, panel punch, Greenlee punch, or a Q-max, [1] is a hand tool used to punch a hole through sheet metal. It is a very simple tool that consists of a punch, die, and screw. There are three different drive systems: manual, ratchet, and hydraulic. [2]