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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. Special Demonstration Squad - Wikipedia

    en.wikipedia.org/wiki/Special_Demonstration_Squad

    The SDS was established by Special Branch as the Special Operations Squad in March 1968. Formed as a response to the anti-war demonstrations held outside the U.S. Embassy in London, then based at Grosvenor Square, the squad's purpose was to infiltrate "left-wing direct-action groups" using undercover police officers (nicknamed "hairies" because of their hippie appearance), who would liaise ...

  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. 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 ...

  6. Students for a Democratic Society - Wikipedia

    en.wikipedia.org/wiki/Students_for_a_Democratic...

    t. e. Students for a Democratic Society ( SDS) was a national student activist organization in the United States during the 1960s and was one of the principal representations of the New Left. Disdaining permanent leaders, hierarchical relationships and parliamentary procedure, the founders conceived of the organization as a broad exercise in ...

  7. GHS precautionary statements - Wikipedia

    en.wikipedia.org/wiki/GHS_precautionary_statements

    Precautionary statements are one of the key elements for the labelling of containers under the GHS, along with: [4] an identification of the product; one or more hazard pictograms ( where necessary) a signal word – either Danger or Warning – where necessary. hazard statements, indicating the nature and degree of the risks posed by the product.

  8. Safety data sheet - Wikipedia

    en.wikipedia.org/wiki/Safety_data_sheet

    A safety data sheet ( SDS ), [1] material safety data sheet ( MSDS ), or product safety data sheet ( PSDS) is a document that lists information relating to occupational safety and health for the use of various substances and products. SDSs are a widely used type of fact sheet used to catalogue information on chemical species including chemical ...

  9. SD card - Wikipedia

    en.wikipedia.org/wiki/SD_card

    This microSDHC card holds 8 billion bytes. Beneath it is a section of a magnetic-core memory (used until the 1970s) that holds eight bytes using 64 cores. The card covers approximately 20 bits (2 + 1 ⁄ 2 bytes).