Monospace fonts

http://www.lowing.org/fonts/

Monospace fonts (Such as Courier or LetterGothic), or “fixed pitch” fonts, contain characters that all have the same character width, producing text that can be used to create forms, tabular material or documents that require exact text line lengths. An example of a fixed pitch font is Courier 12 pitch, which is a 10 point font that will print at exactly 12 characters per inch.

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  Good Programming Font Criteria
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      Crisp clear characters.
    
    
      Extended characterset.
    
    
      Good use of whitespace.
    
    
      'l', '1' and 'i' are easily distinguished
    
    
      '0', 'o' and 'O' are easily distinguished
    
    
      forward quotes from back quotes are easily distinguished -prefer mirrored appearance
    
    
      Clear punctuation characters, especially braces, parenthesis and brackets