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  2. Barcode reader - Wikipedia

    en.wikipedia.org/wiki/Barcode_reader

    Barcode reader. A stationary barcode scanner for a conveyor line. A barcode reader or barcode scanner is an optical scanner that can read printed barcodes and send the data they contain to computer. [1] Like a flatbed scanner, it consists of a light source, a lens, and a light sensor for translating optical impulses into electrical signals.

  3. Emergency vehicle lighting - Wikipedia

    en.wikipedia.org/wiki/Emergency_vehicle_lighting

    Emergency vehicle lighting, also known as simply emergency lighting or emergency lights, is a type of vehicle lighting used to visually announce a vehicle's presence to other road users. A sub-type of emergency vehicle equipment, emergency vehicle lighting is generally used by emergency vehicles and other authorized vehicles in a variety of ...

  4. Code 3 (film) - Wikipedia

    en.wikipedia.org/wiki/Code_3_(film)

    Code 3 is an upcoming American action comedy film written by Christopher Leone and Patrick Pianezza, directed by Leone and starring Rainn Wilson, Lil Rel Howery and Aimee Carrero. Cast [ edit ] Rainn Wilson as Randy [1]

  5. Optical landing system - Wikipedia

    en.wikipedia.org/wiki/Optical_landing_system

    The concave mirror, source light combination was replaced with a series of fresnel lenses. The Mk 6 Mod 3 FLOLS was tested in 1970 and had not changed much, except for when ship's heave was taken into account with an inertial stabilisation system. These systems are still in wide use on runways at US Naval Air Stations.

  6. Emergency service response codes - Wikipedia

    en.wikipedia.org/wiki/Emergency_service_response...

    In the United States, response codes are used to describe a mode of response for an emergency unit responding to a call. They generally vary but often have three basic tiers: Code 3: Respond to the call using lights and sirens. Code 2: Respond to the call with emergency lights, but without sirens. Alternatively, sirens may be used if necessary ...

  7. Traffic light - Wikipedia

    en.wikipedia.org/wiki/Traffic_light

    A vertical five-light bar holds the arrows underneath the standard green light ... MUTCD Fig. 8C-3 Three-lens signal Two-lens signal ... Code of Conduct;

  8. Optical resolution - Wikipedia

    en.wikipedia.org/wiki/Optical_resolution

    The original application called for placing the chart at a distance 26 times the focal length of the imaging lens used. The bars above and to the left are in sequence, separated by approximately the square root of two (12, 17, 24, etc.), while the bars below and to the left have the same separation but a different starting point (14, 20, 28, etc.)

  9. Los Angeles Police Department resources - Wikipedia

    en.wikipedia.org/wiki/Los_Angeles_Police...

    The Los Angeles Police Department (LAPD), the primary law enforcement agency of Los Angeles, California, United States, maintains and uses a variety of resources that allow its officers to effectively perform their duties. The LAPD's organization is complex with the department divided into bureaus and offices that oversee functions and manage ...

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