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  1. Codes consisting of light and dark marks which may be optically read is known as

    2. A.

     Mnemonics
    B.

     Bar code
    C.

     Decoder
    D.

     All of the above
    E.

     None of the above

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    Workspace

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    Answer : Option B

    Explanation :

    Bar code : A barcode (also bar code) is an optical, machine-readable, representation of data; the data usually describes something about the object that carries the barcode. Initially, barcodes were only scanned by special optical scanners called barcode readers. Barcode was invented by Norman Joseph Woodland and Bernard Silver and patented in US in 1952.
    For Example :

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