The Ahem font belongs to the public domain. In jurisdictions that do not recognize public domain ownership of these files, the following Creative Commons Zero declaration applies: http://labs.creativecommons.org/licenses/zero-waive/1.0/us/legalcode The Ahem font was developed by Todd Fahrner and Myles C. Maxfield to help test writers develop predictable tests. The units per em is 1000, the ascent is 800, and the descent is 200, thereby making the em square exactly square. The glyphs for most characters is simply a box which fills this square. The codepoints mapped to this full square with a full advance are the following ranges: U+20-U+26 U+28-U+6F U+71-U+7E U+A0-U+C8 U+CA-U+FF U+131 U+152-U+153 U+178 U+192 U+2C6-U+2C7 U+2C9 U+2D8-U+2DD U+394 U+3A5 U+3A7 U+3A9 U+3BC U+3C0 U+2013-U+2014 U+2018-U+201A U+201C-U+201E U+2020-U+2022 U+2026 U+2030 U+2039-U+203A U+2044 U+2122 U+2126 U+2202 U+2206 U+220F U+2211-U+2212 U+2219-U+221A U+221E U+222B U+2248 U+2260 U+2264-U+2265 U+22F2 U+25CA U+3007 U+4E00 U+4E03 U+4E09 U+4E5D U+4E8C U+4E94 U+516B U+516D U+5341 U+56D7 U+56DB U+571F U+6728 U+6C34 U+706B U+91D1 U+F000-U+F002 The codepoints which are mapped to something else are the following: " " (U+20): No path but full advance "p" (U+70): Path has 0 ascent but full descent "É" (U+C9): Path has 0 descent but full ascent Non-breaking space (U+A0): No path but full advance Zero-width non-breaking space (U+FEFF): No path and 0 advance En space (U+2002): No path and half advance Em space (U+2003): No path but full advance Three-per-em space (U+2004): No path and one third advance Four-per-em space (U+2005): No path and one quarter advance Six-per-em space (U+2006): No path and one sixth advance Thin space (U+2009): No path and one fifth advance Hair space (U+200A): No path and one tenth advance Zero width space (U+200B): No path and no advance Ideographic space (U+3000): No path but full advance Zero width non-joiner (U+200C): No path and no advance Zero width joiner (U+200D): No path and no advance Greek capital letter Upsilon (U+3A5): Thin vertical stripe and full advance Greek capital letter Chi (U+3A7): Thin horizontal stripe and full advance "横" (U+6A2A): Thin horizontal stripe and full advance "橫" (U+6A6B): Thin horizontal stripe and full advance; "縦" (U+7E26): Thin vertical stripe and full advance; "縱" (U+7E31): Thin vertical stripe and full advance; "纵" (U+7EB5): Thin vertical stripe and full advance.