Graphic Characters (ANSI and GNU Common Lisp Document)

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#### 13.1.4.1 Graphic Characters

Characters that are classified as graphic , or displayable, are each associated with a glyph, a visual representation of the character.

A graphic character is one that has a standard textual representation as a single glyph, such as `A` or `*` or `=`. Space, which effectively has a blank glyph, is defined to be a graphic.

Of the standard characters, newline is non-graphic and all others are graphic; see Standard Characters.

Characters that are not graphic are called non-graphic .

Non-graphic characters are sometimes informally called “formatting characters” or “control characters.”

`#\Backspace`, `#\Tab`, `#\Rubout`, `#\Linefeed`, `#\Return`, and `#\Page`, if they are supported by the implementation, are non-graphic.