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  2. Police code - Wikipedia

    en.wikipedia.org/wiki/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 other ...

  3. 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 the informal code of silence among police officers in the United States not to report on a colleague 's errors, misconducts, or crimes, especially as related to police brutality in the United States. [4] If questioned about an incident of alleged ...

  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. Ten-code - Wikipedia

    en.wikipedia.org/wiki/Ten-code

    The ten-codes used by the New York Police Department have returned to public attention thanks to the popularity of the television series Blue Bloods. However, the ten-codes used by the NYPD are not the same as those used in the APCO system. For example, in the NYPD system, Code 10-13 means "Officer needs help," whereas in the APCO system ...

  6. Major retailers are backtracking on self-checkout - AOL

    www.aol.com/news/major-retailers-backtracking...

    After years of investing in self-checkouts, Five Below, Dollar General and others are refocusing on human cashiers, citing long-running concerns about lost inventory.

  7. Los Angeles Police Department resources - Wikipedia

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

    Code 10: Request to clear frequency for broadcast of wanted/warrant information; Code 12: Request to clear frequency for request for information on potential individual arrest warrant; Code 20: Notify media (or media already on scene) Code 30: Burglar alarm (can be Code 30-Silent) Code 30-Adam: Burglar alarm, location is monitored with audio by ...

  8. 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 ...

  9. Thin blue line - Wikipedia

    en.wikipedia.org/wiki/Thin_blue_line

    The blue line symbol. The " thin blue line " is a term that typically refers to the concept of the police as the line between law-and-order and chaos in society. [1] The "blue" in "thin blue line" refers to the blue color of the uniforms of many police departments. The phrase originated as an allusion to The Thin Red Line incident during the ...