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Tally marks, also called hash marks, are a form of numeral used for counting. They can be thought of as a unary numeral system . They are most useful in counting or tallying ongoing results, such as the score in a game or sport, as no intermediate results need to be erased or discarded.
Question mark: Inverted question mark, Interrobang “ ” " " ‘ ’ ' ' Quotation marks: Apostrophe, Ditto, Guillemets, Prime: Inch, Second ® Registered trademark symbol: Trademark symbol ※ Reference mark: Asterisk, Dagger: Footnote ¤ Scarab (non-Unicode name) ('Scarab' is an informal name for the generic currency sign) § Section sign ...
There are also two characters for use in representing traditional European tally marks (only Tally Mark One and Tally Mark Five are encoded, with tally numbers two through four intended to be represented as a sequence of two through four Tally Mark One characters).
The single tally stick was an elongated piece of bone, ivory, wood, or stone which is marked with a system of notches (see: Tally marks). The single tally stick serves predominantly mnemonic purposes. Related to the single tally concept are messenger sticks (used by, e.g., Inuit tribes), the knotted cords, khipus or quipus, as used by the Inca.
Tally marks, Counting. Unary numbering is used as part of some data compression algorithms such as Golomb coding. It also forms the basis for the Peano axioms for formalizing arithmetic within mathematical logic. A form of unary notation called Church encoding is used to represent numbers within lambda calculus.
Tally marks represent one such system still in common use. The unary system is only useful for small numbers, although it plays an important role in theoretical computer science . Elias gamma coding , which is commonly used in data compression , expresses arbitrary-sized numbers by using unary to indicate the length of a binary numeral.
Tally marks, a form of numeral used in a unary numeral system, most useful in counting or tallying ongoing results, such as the score in a game or sport; Tally sort, a computer science counting and sorting algorithm; Tally stick, an ancient memory aid device to record and document numbers, quantities, or even messages
Radix, radix point, mixed radix, exponentiation; Unary numeral system (base 1) . Tally marks – Numeral form used for counting; Binary numeral system (base 2); Negative base numeral system (base −2)