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  2. Pet door - Wikipedia

    en.wikipedia.org/wiki/Pet_door

    Pet door. A dog exiting through a pet door. A pet door or pet flap (also referred to in more specific terms, such as cat flap, cat door, kitty door, dog flap, dog door, or doggy/doggie door) is a small opening to allow pets to enter and exit a building on their own without needing a human to open the door. Originally simple holes, the modern ...

  3. Door closer - Wikipedia

    en.wikipedia.org/wiki/Door_closer

    A door closer is a mechanical device that regulates the speed and action of a door ’s swing. [1] Manual closers store the force used to open the door in some type of spring and reuse it to close the door. Automatic types use electricity to regulate door swing behavior. Door closers can be linked to a building's fire and security alarm systems.

  4. Automatic door - Wikipedia

    en.wikipedia.org/wiki/Automatic_door

    Automatic door. A pair of automatic doors. An automatic door, also known as an auto door, is a door that opens automatically, without the need for human intervention or usually upon sensing the approach of a person. A person can be detected by microwave pulses, infrared sensors, or pressure-sensing pads. [1]

  5. Door - Wikipedia

    en.wikipedia.org/wiki/Door

    A pet door (also known as a cat flap or dog door) is an opening in a door to allow pets to enter and exit without the main door's being opened. It may be simply covered by a rubber flap, or it may be an actual door hinged on the top that the pet can push through. Pet doors may be mounted in a sliding glass door as a new (permanent or temporary ...

  6. Sliding glass door - Wikipedia

    en.wikipedia.org/wiki/Sliding_glass_door

    In architecture and construction, a sliding glass door (also patio door or doorwall[1][2]) is a type of sliding door made predominantly from glass, that is situated in an external wall to provide egress and light. The doors can give access to a backyard or patio while providing a pleasant view, [3][4] and when not fully covered can be a source ...

  7. What kind of bird is Woodstock? Some history on Snoopy ... - AOL

    www.aol.com/kind-bird-woodstock-history-snoopys...

    The "Peanuts" comic strip celebrated its 74th anniversary this year, having made its debut on Oct. 2, 1950.For the last seven-plus decades, the series has delighted audiences through various forms ...