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  2. Timeline of binary prefixes - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_binary_prefixes

    The Macintosh Operating System is the earliest known operating system using the prefix K in a binary sense to report both memory size and HDD capacity. [ 84 ] In the original 1984 Apple Macintosh ad, page 8, Apple characterized its 3 1 ⁄ 2 floppy disk as "400 K ", that is, 800 × 512 byte sectors or 409 600 bytes = 400 KiB.

  3. History of the metric system - Wikipedia

    en.wikipedia.org/wiki/History_of_the_metric_system

    The 20th century history of measurement is marked by five periods: the 1901 definition of the coherent MKS system; the intervening 50 years of coexistence of the MKS, cgs and common systems of measures; the 1948 Practical system of units prototype of the SI; the introduction of the SI in 1960; and the evolution of the SI in the latter half century.

  4. Metric prefix - Wikipedia

    en.wikipedia.org/wiki/Metric_prefix

    [20] [21] [22] The decimal prefix for ten thousand, myria-(sometimes spelt myrio-), and the early binary prefixes double-(2×) and demi-(⁠ 1 / 2 ⁠ ×) were parts of the original metric system adopted by France in 1795, [23] [d] but were not retained when the SI prefixes were internationally adopted by the 11th CGPM conference in 1960.

  5. Binary code - Wikipedia

    en.wikipedia.org/wiki/Binary_code

    The word 'Wikipedia' represented in ASCII binary code, made up of 9 bytes (72 bits). A binary code represents text, computer processor instructions, or any other data using a two-symbol system. The two-symbol system used is often "0" and "1" from the binary number system. The binary code assigns a pattern of binary digits, also known as bits ...

  6. System of units of measurement - Wikipedia

    en.wikipedia.org/wiki/System_of_units_of_measurement

    A system of units of measurement, also known as a system of units or system of measurement, is a collection of units of measurement and rules relating them to each other. Systems of measurement have historically been important, regulated and defined for the purposes of science and commerce .

  7. Chinese mathematics - Wikipedia

    en.wikipedia.org/wiki/Chinese_mathematics

    Infinity is reached, that is, there are non-collision singularities. The Painleve conjecture is an important conjecture in the field of power systems proposed in 1895. A very important recent development for the 4-body problem is that Xue Jinxin and Dolgopyat proved a non-collision singularity in a simplified version of the 4-body system around ...

  8. Metric system - Wikipedia

    en.wikipedia.org/wiki/Metric_system

    The SI system has been adopted as the official system of weights and measures by most countries in the world. A notable outlier is the United States (US). Although used in some contexts, the US has resisted full adoption; continuing to use "a conglomeration of basically incoherent measurement systems". [2]

  9. History of measurement - Wikipedia

    en.wikipedia.org/wiki/History_of_measurement

    The division of the circle into 360 degrees and the day into hours, minutes, and seconds can be traced to the Babylonians who had a sexagesimal system of numbers. The 360 degrees may have been related to a year of 360 days. Many other systems of measurement divided the day differently—counting hours, decimal time, etc.