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  2. Percentile - Wikipedia

    en.wikipedia.org/wiki/Percentile

    Each standard deviation represents a fixed percentile. Thus, rounding to two decimal places, −3σ is the 0.13th percentile, −2σ the 2.28th percentile, −1σ the 15.87th percentile, 0σ the 50th percentile (both the mean and median of the distribution), +1σ the 84.13th percentile, +2σ the 97.72nd percentile, and +3σ the 99

  3. Binary number - Wikipedia

    en.wikipedia.org/wiki/Binary_number

    In the example below, the divisor is 101 2, or 5 in decimal, while the dividend is 11011 2, or 27 in decimal. The procedure is the same as that of decimal long division; here, the divisor 101 2 goes into the first three digits 110 2 of the dividend one time, so a "1" is written on the top line. This result is multiplied by the divisor, and ...

  4. Manchester Baby - Wikipedia

    en.wikipedia.org/wiki/Manchester_Baby

    The divisions were implemented by repeated subtractions of the divisor. The Baby took 3.5 million operations and 52 minutes to produce the answer (131,072). The program used eight words of working storage in addition to its 17 words of instructions, giving a program size of 25 words. [40]

  5. Orders of magnitude (numbers) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(numbers)

    Mathematics – Answer to the wheat and chessboard problem: When doubling the grains of wheat on each successive square of a chessboard, beginning with one grain of wheat on the first square, the final number of grains of wheat on all 64 squares of the chessboard when added up is 2 64 −1 = 18,446,744,073,709,551,615 (≈1.84 × 10 19).

  6. Clock - Wikipedia

    en.wikipedia.org/wiki/Clock

    An analog pendulum clock made around 18th century. A clock or chronometer is a device that measures and displays time.The clock is one of the oldest human inventions, meeting the need to measure intervals of time shorter than the natural units such as the day, the lunar month, and the year.

  7. Central processing unit - Wikipedia

    en.wikipedia.org/wiki/Central_processing_unit

    The System/360 Model 65 had an 8-bit adder for decimal and fixed-point binary arithmetic and a 60-bit adder for floating-point arithmetic. [76] Many later CPU designs use similar mixed bit width, especially when the processor is meant for general-purpose use where a reasonable balance of integer and floating-point capability is required.

  8. Isaac Asimov - Wikipedia

    en.wikipedia.org/wiki/Isaac_Asimov

    Isaac Asimov (/ ˈ æ z ɪ m ɒ v / AZ-im-ov; [b] [c] c. January 2, 1920 [a] – April 6, 1992) was an American writer and professor of biochemistry at Boston University.During his lifetime, Asimov was considered one of the "Big Three" science fiction writers, along with Robert A. Heinlein and Arthur C. Clarke. [2]