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EDIT
Block Elements One of Unicode’s goals is to provide round trip encoding to and from all existing character set standards. To do this, it must encode some pretty silly stuff.
IBM PC Code Page 437 (from 1981), among others, contains a number of characters intended to enable a simple kind of display cell graphics. Before the advent of vector graphics the user was able to create simple bitmaps by filling a fraction of a cell, or shading a cell to some degree. Note that these characters do not form a logically complete set, but are instead just enough for compatibility. Source: http://www.everything2.com/index.pl |
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