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ASCII code Box drawing character single line lower left corner, American Standard Code for Information Interchange, The complete ASCII table, characters,letters, vowels with accents, consonants, signs, symbols, numbers box, drawing, character, single,
Box-drawing character - Wikipedia
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ASCII Art & Unicode — Helftone
Box-drawing character - Wikipedia
Drawing pictures with text (the joys and annoyances of Unicode and Ascii text). – Andrew Fielding