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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. Emergency service response codes - Wikipedia

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

    United States. [] 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.

  4. Ten-code - Wikipedia

    en.wikipedia.org/wiki/Ten-code

    For example, in the NYPD system, Code 10-13 means "Officer needs help," whereas in the APCO system "Officer needs help" is Code 10-33. The New Zealand reality television show Ten 7 Aotearoa (formerly Police Ten 7) takes its name from the New Zealand Police ten-code 10-7, which means "Unit has arrived at job". [citation needed]

  5. Chicago police see less violent crime after using predictive code

    www.engadget.com/2017-08-06-chicago-police-see...

    The city's 7th District police report that their use of predictive algorithms helped reduce the number of shootings 39 percent year-over-year in the first 7 months of 2017, with murders dropping ...

  6. APCO radiotelephony spelling alphabet - Wikipedia

    en.wikipedia.org/wiki/APCO_radiotelephony...

    The APCO phonetic alphabet, a.k.a. LAPD radio alphabet, is the term for an old competing spelling alphabet to the ICAO radiotelephony alphabet, defined by the Association of Public-Safety Communications Officials-International [1] from 1941 to 1974, that is used by the Los Angeles Police Department (LAPD) and other local and state law enforcement agencies across the state of California and ...

  7. Home Office radio - Wikipedia

    en.wikipedia.org/wiki/Home_Office_radio

    Home Office radio. Home Office radio was the VHF and UHF radio service provided by the British government to its prison service, emergency service (police, ambulance and fire brigade) and Home Defence agencies from around 1939. The departmental name was the Home Office Directorate of Telecommunications, commonly referred to as DTELS.

  8. Law enforcement in the United States - Wikipedia

    en.wikipedia.org/wiki/Law_enforcement_in_the...

    As of 2020, more than 900,000 sworn law enforcement officers have been serving in the United States. About 137,000 of those officers work for federal law enforcement agencies. [1] Law enforcement operates primarily through governmental police agencies. There are 17,985 police agencies in the United States which include local police departments ...

  9. Blue wall of silence - Wikipedia

    en.wikipedia.org/wiki/Blue_wall_of_silence

    The blue wall of silence, [1] also blue code[2] and blue shield, [3] are terms used to denote an informal code of silence among police officers in the United States not to report on a colleague 's errors, misconduct, or crimes, especially as related to police brutality in the United States. [4] If questioned about an incident of alleged ...