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  2. List of numeral systems - Wikipedia

    en.wikipedia.org/wiki/List_of_numeral_systems

    This is the minimum number of characters needed to encode a 32 bit number into 5 printable characters in a process similar to MIME-64 encoding, since 85 5 is only slightly bigger than 2 32. Such method is 6.7% more efficient than MIME-64 which encodes a 24 bit number into 4 printable characters.

  3. Numeral system - Wikipedia

    en.wikipedia.org/wiki/Numeral_system

    The simplest numeral system is the unary numeral system, in which every natural number is represented by a corresponding number of symbols. If the symbol / is chosen, for example, then the number seven would be represented by /////. Tally marks represent one such system still in common use.

  4. List of numeral system topics - Wikipedia

    en.wikipedia.org/wiki/List_of_numeral_system_topics

    Radix, radix point, mixed radix, base (mathematics); Unary numeral system (base 1) . Tally marks – Numeral form used for counting; Binary numeral system (base 2); Negative base numeral system (base −2)

  5. International System of Units - Wikipedia

    en.wikipedia.org/wiki/International_System_of_Units

    The International System of Units, internationally known by the abbreviation SI (from French Système international d'unités), is the modern form of the metric system and the world's most widely used system of measurement. It is the only system of measurement with official status in nearly every country in the world, employed in science ...

  6. Undecimal - Wikipedia

    en.wikipedia.org/wiki/Undecimal

    Undecimal (also known as unodecimal, undenary, and the base 11 numeral system) is a positional numeral system that uses eleven as its base. Undecimal numerals have applications in computer science, [1] technology, [2] and the International Standard Book Number system. [3] They also occasionally feature in works of popular fiction. [4]

  7. Alphabetic numeral system - Wikipedia

    en.wikipedia.org/wiki/Alphabetic_numeral_system

    An alphabetic numeral system is a type of numeral system. Developed in classical antiquity , it flourished during the early Middle Ages . [ 1 ] In alphabetic numeral systems, numbers are written using the characters of an alphabet , syllabary , or another writing system .

  8. Timeline of numerals and arithmetic - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_numerals_and...

    940 — Abu'l-Wafa al-Buzjani extracts roots using the Indian numeral system. 953 — The arithmetic of the Hindu–Arabic numeral system at first required the use of a dust board (a sort of handheld blackboard ) because “the methods required moving the numbers around in the calculation and rubbing some out as the calculation proceeded.”

  9. Morse code - Wikipedia

    en.wikipedia.org/wiki/Morse_code

    Chart of the Morse code 26 letters and 10 numerals [1]. This Morse key was originally used by Gotthard railway, later by a shortwave radio amateur [2]. Morse code is a telecommunications method which encodes text characters as standardized sequences of two different signal durations, called dots and dashes, or dits and dahs.