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  2. Police code - Wikipedia

    en.wikipedia.org/wiki/Police_code

    Police code. A police code is a brevity code, usually numerical or alphanumerical, used to transmit information between law enforcement over police radio systems in the United States. Examples of police codes include "10 codes" (such as 10-4 for "okay" or "acknowledged"—sometimes written X4 or X-4), signals, incident codes, response codes, or ...

  3. Ten-code - Wikipedia

    en.wikipedia.org/wiki/Ten-code

    The police version of ten-codes is officially known as the APCO Project 14 Aural Brevity Code. [1] The codes, developed during 1937–1940 and expanded in 1974 by the Association of Public-Safety Communications Officials-International (APCO), allow brevity and standardization of message traffic.

  4. 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 ...

  5. Hospital emergency codes - Wikipedia

    en.wikipedia.org/wiki/Hospital_emergency_codes

    Hospital emergency codes are coded messages often announced over a public address system of a hospital to alert staff to various classes of on-site emergencies. The use of codes is intended to convey essential information quickly and with minimal misunderstanding to staff while preventing stress and panic among visitors to the hospital.

  6. New York City Police Department - Wikipedia

    en.wikipedia.org/wiki/New_York_City_Police...

    Established on May 23, 1845, the NYPD is the largest, and one of the oldest, municipal police departments in the United States. [7] The NYPD is headquartered at 1 Police Plaza, located on Park Row in Lower Manhattan near City Hall. The NYPD's regulations are compiled in title 38 of the New York City Rules.

  7. Telephone numbers in Denmark - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_Denmark

    62, 64, 65, 66. Today (since 1989) the same telephone number is dialed in Denmark, regardless of where you call from, but the dialling information is still in principle at the forefront of the number. Numbers beginning with 20-31 are preferably mobile numbers, those beginning with 70 and 72-79 are preferably landline numbers, and so on.

  8. Aerial roof markings - Wikipedia

    en.wikipedia.org/wiki/Aerial_roof_markings

    Police vehicles Aerial roof markings on London Metropolitan police car. Police vehicles in the United Kingdom have markings of symbols, letters and numbers on their tops to enable aircraft to identify them. These markings show the use of the vehicle, its force code and a vehicle identifying mark or the police division to which the vehicle belongs.

  9. List of United States state and local law enforcement ...

    en.wikipedia.org/wiki/List_of_United_States...

    This is a list of U.S. state and local law enforcement agencies — local, regional, special and statewide government agencies (state police) of the U.S. states, of the federal district, and of the territories that provide law enforcement duties, including investigations, prevention and patrol functions.