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  2. Barcode reader - Wikipedia

    en.wikipedia.org/wiki/Barcode_reader

    On the other hand, if a too small dot of light is used, then it can misinterpret any spot on the bar code making the final output wrong. The most commonly used dimension is 13 mil (0.013 in or 0.33 mm), although some scanners can read codes with dimensions as small as 3 mil (0.003 in or 0.075 mm). Smaller bar codes must be printed at high ...

  3. Precision approach path indicator - Wikipedia

    en.wikipedia.org/wiki/Precision_Approach_Path...

    The light characteristics of all light units are identical. In good visibility conditions the guidance information can be used at ranges up to 5 miles (8.0 km) by day and night. At night the light bars can be seen at ranges of at least 20 miles (32 km). PAPI systems are readily available from airfield lighting manufacturers worldwide.

  4. Common Access Card - Wikipedia

    en.wikipedia.org/wiki/Common_Access_Card

    There are three color code schemes used on the front of the CAC. A blue bar across the holder’s name shows that the cardholder is a non-U.S. citizen. A green bar shows that the cardholder is a contractor. Absence of a bar indicates all other personnel—including military personnel and civil workers, among others.

  5. Barcode - Wikipedia

    en.wikipedia.org/wiki/Barcode

    Barcode. A UPC-A barcode. A barcode or bar code is a method of representing data in a visual, machine-readable form. Initially, barcodes represented data by varying the widths, spacings and sizes of parallel lines. These barcodes, now commonly referred to as linear or one-dimensional (1D), can be scanned by special optical scanners, called ...

  6. Intelligent Mail barcode - Wikipedia

    en.wikipedia.org/wiki/Intelligent_Mail_barcode

    This section of the code may be omitted, but if it is present, the 5-, 9-, or 11-digit forms of the ZIP Code are also encoded in the Intelligent Mail barcode. The full 11-digit form includes the standard 5-digit ZIP code, the ZIP + 4 code, and a 2-digit code indicating the exact delivery point. This is the same information that was encoded in ...

  7. Code 3 Collectibles - Wikipedia

    en.wikipedia.org/wiki/Code_3_Collectibles

    The models created by Code 3 Collectibles, were stock models which had been customized or converted from their original state. A few examples of Code 3 Collectibles models plain white cars or vans which have been painted or have had decals added with the livery of a police force such as stripes, force badge/crest, force code etc. Extras such as lightbars and possibly tools have been added as well.

  8. Emergency service response codes - Wikipedia

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

    Code 1: A time critical event with response requiring lights and siren. This usually is a known and going fire or a rescue incident. Code 2: Unused within the Country Fire Authority. Code 3: Non-urgent event, such as a previously extinguished fire or community service cases (such as animal rescue or changing of smoke alarm batteries for the ...

  9. List of bicycle parts - Wikipedia

    en.wikipedia.org/wiki/List_of_bicycle_parts

    Chainset: see Crankset. Chainstay: a pair of tubes on a bicycle frame that runs from the bottom bracket to the rear fork ends. Chain tensioner: a device to maintain proper chain tension. Chaintug: a device to aid in setting the proper chain tension. Cluster: a bicycle cogset, either a freewheel, or cassette.

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