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The Nippon Decimal Classification (NDC, also called the Nippon Decimal System) is a system of library classification developed for mainly Japanese-language books maintained and revised by the Japan Library Association since 1948. Originally developed in 1929 by Kiyoshi Mori, the 10th and latest edition of this system was published in 2014.
This is the system used with the traditional Japanese units of measurement. Several of the names are used "as is" to represent a fraction of a sun. The other system of representing these decimal fractions of rate or discount uses a system "shifted down" with a bu becoming a "one hundredth" and so on, and the unit for "tenth" becoming wari:
With the majority of the public now exposed to it since childhood, [7] the metric system became the sole legal measurement system in most fields of Japanese life on 1 January 1959. [4] Redrafting of laws to use metric equivalents had already been accomplished, but conversion of the land registries required until 31 March 1966 to complete.
Any such symbol can be called a decimal mark, decimal marker, or decimal sign. Symbol-specific names are also used; decimal point and decimal comma refer to a dot (either baseline or middle ) and comma respectively, when it is used as a decimal separator; these are the usual terms used in English, [ 1 ] [ 2 ] [ 3 ] with the aforementioned ...
A suanpan (top) and a soroban (bottom). The two abaci seen here are of standard size and have thirteen rods each. Another variant of soroban. The soroban is composed of an odd number of columns or rods, each having beads: one separate bead having a value of five, called go-dama (五玉, ごだま, "five-bead") and four beads each having a value of one, called ichi-dama (一玉, いちだま ...
Grouped by their numerical property as used in a text, Unicode has four values for Numeric Type. First there is the "not a number" type. Then there are decimal-radix numbers, commonly used in Western style decimals (plain 0–9), there are numbers that are not part of a decimal system such as Roman numbers, and decimal numbers in typographic context, such as encircled numbers.
This new coinage gave Japan a western style decimal system based on units of yen, which were broken down into subsidiary currency of sen, and rin. [4] [5] The first coins minted were trial strikes or pattern coins, which are dated 1869 (year 2 of Meiji) and 1870 (year 3). No coins were struck for circulation right away as the technology to mass ...
This new coinage gave Japan a western style decimal system which was based on units of yen, sen, and rin. [5] [6] Each half sen coin was authorized to weigh 55 grains (3.56 g) struck in a copper alloy. [5] [7] The first coins minted are dated 1870 (year 3), but these were intended as trial strikes or pattern coins. Circulating coins were ...