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Black pens, box of twenty ..... £2.10 Blue ″ ″ ″ ″ ..... £2.35
The word ditto comes from the Tuscan language, where it is the past participle of the verb dire (to say), with the meaning of “said”, as in the locution “the said story”. The first recorded use of ditto with this meaning in English occurs in 1625. Early evidence of ditto marks can be seen on a cuneiform tablet of the Neo-Assyrian period (934 – 608 BC) where two vertical marks are used in a table of synonyms to repeat text, while in China the corresponding mark is two horizontal lines (二); see iteration mark.
Unicode points to U+2033 ″ double prime (HTML:
″) to be used (see below). In practice, however, closing double quotation marks (”) or straight double quotation marks (") are often used instead. The abbreviation do. is also used.
In Unicode, there is a charcacter U+3003 〃 ditto mark (HTML:
〃 block: CJK Symbols and Punctuation). Its
Script_Extensions property specifies scrips that use the mark: Bopomofo, Hangul, Han, Hiragana and Katakana. That is, East Asian scripts, shortly named CJK. So according to Unicode research, this ditto mark graph is not found to be used in Western (Latin) script, and is supposed not to be used in there.
See also 
- Definition at The Free Dictionary
- K.4375 and File:Library of Ashurbanipal synonym list tablet.jpg
- "CJK symbols and Punctuation". Retrieved 2013-05-20.
- "Unicode Standard Annex #24: Unicode Script Property". 2.9 Script_Extensions Property. Retrieved 2013-05-19.
- "ScriptExtensions.txt". Retrieved 2013-05-19.
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