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  2. Universal Product Code - Wikipedia

    en.wikipedia.org/wiki/Universal_Product_Code

    A UPC barcode. The Universal Product Code (UPC or UPC code) is a barcode symbology that is used worldwide for tracking trade items in stores.. The chosen symbology has bars (or spaces) of exactly 1, 2, 3, or 4 units wide each; each decimal digit to be encoded consists of two bars and two spaces chosen to have a total width of 7 units, in both an "even" and an "odd" parity form, which enables ...

  3. Numerical digit - Wikipedia

    en.wikipedia.org/wiki/Numerical_digit

    The ten digits of the Arabic numerals, in order of value.. A numerical digit (often shortened to just digit) or numeral is a single symbol used alone (such as "1") or in combinations (such as "15"), to represent numbers in a positional numeral system.

  4. Payment card number - Wikipedia

    en.wikipedia.org/wiki/Payment_card_number

    Payment card numbers are composed of 8 to 19 digits, [1] The leading six or eight digits are the issuer identification number (IIN) sometimes referred to as the bank identification number (BIN). [ 2 ] : 33 [ 3 ] The remaining numbers, except the last digit, are the individual account identification number.

  5. International Bank Account Number - Wikipedia

    en.wikipedia.org/wiki/International_Bank_Account...

    Calculated separately for the bank code (seven digits) and account number (ten digits). The last digit of each value is its check digit. Czech Republic [17] Weighted 6, 3, 7, 9, 10, 5, 8, 4, 2, 1 11 11 − r, 0 → 0 Calculated separately for the account number (ten digits) and branch number (six digits, using the last six weights).

  6. Permanent account number - Wikipedia

    en.wikipedia.org/wiki/Permanent_account_number

    REQUEST FOR NEW PAN CARD OR/AND CHANGES OR CORRECTION IN PAN DATA: [13] - The same form can be used by Indians as well as foreign citizens for update of PAN data or Reprint of PAN Card. A new PAN card bearing the same PAN but updated information is issued to the applicant, in such a case. [14] PAN allotment based on Aadhaar is free of cost. A ...

  7. Significant figures - Wikipedia

    en.wikipedia.org/wiki/Significant_figures

    An exact number has an infinite number of significant figures. If the number of apples in a bag is 4 (exact number), then this number is 4.0000... (with infinite trailing zeros to the right of the decimal point). As a result, 4 does not impact the number of significant figures or digits in the result of calculations with it.

  8. Telephone keypad - Wikipedia

    en.wikipedia.org/wiki/Telephone_keypad

    These letter assignments have been used for multiple purposes. Originally, they referred to the leading letters of telephone exchange names.In the mid-20th century United States, before the switch to All-Number Calling, telephone numbers had seven digits, including a two-digit prefix which was expressed in letters rather than digits, e.g.; KL5-5445.

  9. Abbe–Koenig prism - Wikipedia

    en.wikipedia.org/wiki/Abbe–Koenig_prism

    The prism is also less bulky than the double Porro design. The prism is sometimes simply called a "roof prism", although this is ambiguous, because other roof prisms exist, such as the Amici and Schmidt–Pechan designs. A variant of the Abbe–Koenig prism replaces the "roof" section of the prism with a single mirror-coated reflecting surface.

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