I copied this information from a web page at the World Wide Web consortium, and then I modified it (turned it into a table, and added the ``examples'' column).
See also the tables here for more recent specs.
| reference | description | example |
|---|---|---|
| � -  | Unused | ``�'', ``'', ``'', ``'', ``'', ``'', ``'', ``'', ``'' |
| 	 | Horizontal tab | `` '' |
| | Line feed | `` '' |
|  -  | Unused | `` '', ``'' |
| | Carriage Return | `` '' |
|  -  | Unused | ``'', ``'', ``'', ``'', ``'', ``'', ``'', ``'', ``'', ``'', ``'', ``'', ``'', ``'', `` '', `` '', `` '', `` '' |
|   | Space | `` '' |
| ! | Exclamation mark | ``!'' |
| " | Quotation mark | ``"'' |
| # | Number sign | ``#'' |
| $ | Dollar sign | ``$'' |
| % | Percent sign | ``%'' |
| & | Ampersand | ``&'' |
| ' | Apostrophe | ``''' |
| ( | Left parenthesis | ``('' |
| ) | Right parenthesis | ``)'' |
| * | Asterisk | ``*'' |
| + | Plus sign | ``+'' |
| , | Comma | ``,'' |
| - | Hyphen | ``-'' |
| . | Period (fullstop) | ``.'' |
| / | Solidus (slash) | ``/'' |
| 0 - 9 | Digits 0-9 | ``0 1 ... 9'' |
| : | Colon | ``:'' |
| ; | Semi-colon | ``;'' |
| < | Less than | ``<'' |
| = | Equals sign | ``='' |
| > | Greater than | ``>'' |
| ? | Question mark | ``?'' |
| @ | Commercial at | ``@'' |
| A - Z | Letters A-Z | ``A B ... Z'' |
| [ | Left square bracket | ``['' |
| \ | Reverse solidus (backslash) | ``\'' |
| ] | Right square bracket | ``]'' |
| ^ | Caret | ``^'' |
| _ | Horizontal bar (underscore) | ``_'' |
| ` | Acute (grave?) accent | ```'' |
| a - z | Letters a-z | ``a b ... z'' |
| { | Left curly brace | ``{'' |
| | | Vertical bar | ``|'' |
| } | Right curly brace | ``}'' |
| ~ | Tilde | ``~'' |
|  - Ÿ | Unused | ``'', ``€'', ``'', ``‚'', ``ƒ'', ``„'', ``…'', ``†'', ``‡'', ``ˆ'', ``‰'', ``Š'', ``‹'', ``Œ'', ``'', ``Ž'', ``'', ``'', ``‘'', ``’'', ``“'', ``”'', ``•'', ``–'', ``—'', ``˜'', ``™'', ``š'', ``›'', ``œ'', ``'', ``ž'', ``Ÿ'' |
|   | Non-breaking Space | `` '' |
| ¡ | Inverted exclamation | ``¡'' |
| ¢ | Cent sign | ``¢'' |
| £ | Pound sterling | ``£'' |
| ¤ | General currency sign | ``¤'' |
| ¥ | Yen sign | ``¥'' |
| ¦ | Broken vertical bar | ``¦'' |
| § | Section sign | ``§'' |
| ¨ | Umlaut (dieresis) | ``¨'' |
| © | Copyright | ``©'' |
| ª | Feminine ordinal | ``ª'' |
| « | Left angle quote, guillemotleft | ``«'' |
| ¬ | Not sign | ``¬'' |
| ­ | Soft hyphen | ``'' |
| ® | Registered trademark | ``®'' |
| ¯ | Macron accent | ``¯'' |
| ° | Degree sign | ``°'' |
| ± | Plus or minus | ``±'' |
| ² | Superscript two | ``²'' |
| ³ | Superscript three | ``³'' |
| ´ | Acute accent | ``´'' |
| µ | Micro sign | ``µ'' |
| ¶ | Paragraph sign | ``¶'' |
| · | Middle dot | ``·'' |
| ¸ | Cedilla | ``¸'' |
| ¹ | Superscript one | ``¹'' |
| º | Masculine ordinal | ``º'' |
| » | Right angle quote, guillemotright | ``»'' |
| ¼ | Fraction one-fourth | ``¼'' |
| ½ | Fraction one-half | ``½'' |
| ¾ | Fraction three-fourths | ``¾'' |
| ¿ | Inverted question mark | ``¿'' |
| À | Capital A, grave accent | ``À'' |
| Á | Capital A, acute accent | ``Á'' |
| Â | Capital A, circumflex accent | ``Â'' |
| Ã | Capital A, tilde | ``Ã'' |
| Ä | Capital A, dieresis or umlaut mark | ``Ä'' |
| Å | Capital A, ring | ``Å'' |
| Æ | Capital AE dipthong (ligature) | ``Æ'' |
| Ç | Capital C, cedilla | ``Ç'' |
| È | Capital E, grave accent | ``È'' |
| É | Capital E, acute accent | ``É'' |
| Ê | Capital E, circumflex accent | ``Ê'' |
| Ë | Capital E, dieresis or umlaut mark | ``Ë'' |
| Ì | Capital I, grave accent | ``Ì'' |
| Í | Capital I, acute accent | ``Í'' |
| Î | Capital I, circumflex accent | ``Î'' |
| Ï | Capital I, dieresis or umlaut mark | ``Ï'' |
| Ð | Capital Eth, Icelandic | ``Ð'' |
| Ñ | Capital N, tilde | ``Ñ'' |
| Ò | Capital O, grave accent | ``Ò'' |
| Ó | Capital O, acute accent | ``Ó'' |
| Ô | Capital O, circumflex accent | ``Ô'' |
| Õ | Capital O, tilde | ``Õ'' |
| Ö | Capital O, dieresis or umlaut mark | ``Ö'' |
| × | Multiply sign | ``×'' |
| Ø | Capital O, slash | ``Ø'' |
| Ù | Capital U, grave accent | ``Ù'' |
| Ú | Capital U, acute accent | ``Ú'' |
| Û | Capital U, circumflex accent | ``Û'' |
| Ü | Capital U, dieresis or umlaut mark | ``Ü'' |
| Ý | Capital Y, acute accent | ``Ý'' |
| Þ | Capital THORN, Icelandic | ``Þ'' |
| ß | Small sharp s, German (sz ligature) | ``ß'' |
| à | Small a, grave accent | ``à'' |
| á | Small a, acute accent | ``á'' |
| â | Small a, circumflex accent | ``â'' |
| ã | Small a, tilde | ``ã'' |
| ä | Small a, dieresis or umlaut mark | ``ä'' |
| å | Small a, ring | ``å'' |
| æ | Small ae dipthong (ligature) | ``æ'' |
| ç | Small c, cedilla | ``ç'' |
| è | Small e, grave accent | ``è'' |
| é | Small e, acute accent | ``é'' |
| ê | Small e, circumflex accent | ``ê'' |
| ë | Small e, dieresis or umlaut mark | ``ë'' |
| ì | Small i, grave accent | ``ì'' |
| í | Small i, acute accent | ``í'' |
| î | Small i, circumflex accent | ``î'' |
| ï | Small i, dieresis or umlaut mark | ``ï'' |
| ð | Small eth, Icelandic | ``ð'' |
| ñ | Small n, tilde | ``ñ'' |
| ò | Small o, grave accent | ``ò'' |
| ó | Small o, acute accent | ``ó'' |
| ô | Small o, circumflex accent | ``ô'' |
| õ | Small o, tilde | ``õ'' |
| ö | Small o, dieresis or umlaut mark | ``ö'' |
| ÷ | Division sign | ``÷'' |
| ø | Small o, slash | ``ø'' |
| ù | Small u, grave accent | ``ù'' |
| ú | Small u, acute accent | ``ú'' |
| û | Small u, circumflex accent | ``û'' |
| ü | Small u, dieresis or umlaut mark | ``ü'' |
| ý | Small y, acute accent | ``ý'' |
| þ | Small thorn, Icelandic | ``þ'' |
| ÿ | Small y, dieresis or umlaut mark | ``ÿ'' |
John H. Palmieri, Department of Mathematics, University of Washington, palmieri@math.washington.edu