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  2. Pascaline - Wikipedia

    en.wikipedia.org/wiki/Pascal's_calculator

    The 9's complement of any one-digit decimal number d is 9-d. So the 9's complement of 4 is 5 and the 9's complement of 9 is 0. Similarly, the 11's complement of 3 is 8. In a decimal machine with n dials the 9's complement of a number A is: = and therefore the 9's complement of (A-B) is:

  3. TI-59 / TI-58 - Wikipedia

    en.wikipedia.org/wiki/TI-59_/_TI-58

    The TI-59 is an early programmable calculator, that was manufactured by Texas Instruments from 1977. It is the successor to the TI SR-52, quadrupling the number of "program steps" of storage, and adding "ROM Program Modules" (an insertable ROM chip, capable of holding 5000 program steps).

  4. Help:Using archive.today - Wikipedia

    en.wikipedia.org/wiki/Help:Using_archive.today

    At https://archive.today/, enter the URL of the web page you wish to archive into the "My url is alive and I want to archive its content" field (the red one). Click the "Submit" button. When archiving process completes (it usually takes 5–15 seconds) you will be sent to the archived page.

  5. List of arbitrary-precision arithmetic software - Wikipedia

    en.wikipedia.org/wiki/List_of_arbitrary...

    Variables of BigNumber type can be used, or regular numbers can be converted to big numbers using conversion operator # (e.g., #2.3^2000.1). SmartXML big numbers can have up to 100,000,000 decimal digits and up to 100,000,000 whole digits.

  6. Calculator - Wikipedia

    en.wikipedia.org/wiki/Calculator

    Fractions such as 13 are displayed as decimal approximations, for example rounded to 0.33333333. Also, some fractions (such as 1 ⁄ 7, which is 0.14285714285714; to 14 significant figures) can be difficult to recognize in decimal form; as a result, many scientific calculators are able to work in vulgar fractions or mixed numbers.

  7. Computer number format - Wikipedia

    en.wikipedia.org/wiki/Computer_number_format

    In the decimal system, there are 10 digits, 0 through 9, which combine to form numbers. In an octal system, there are only 8 digits, 0 through 7. That is, the value of an octal "10" is the same as a decimal "8", an octal "20" is a decimal "16", and so on. In a hexadecimal system, there are 16 digits, 0 through 9 followed, by convention, with A ...

  8. Positional notation - Wikipedia

    en.wikipedia.org/wiki/Positional_notation

    10 1 1 3 = 1 × 3 3 + 0 × 3 2 − 1 × 3 1 + 1 × 3 0 = 25. The factorial number system uses a varying radix, giving factorials as place values; they are related to Chinese remainder theorem and residue number system enumerations. This system effectively enumerates permutations.

  9. Help:Archiving a source - Wikipedia

    en.wikipedia.org/wiki/Help:Archiving_a_source

    archive.today is an on-demand web archiving service at https://archive.today. A web archiving service allows Wikipedia editors to reduce link rot by preserving a copy of an online source that can be accessed if the original page is moved, changes, or disappears. Not all web pages can be archived using archive.today.