a abbreviation alphabets derived from the latin alt alt code alternating current ampersand ancient greek apostrophe approximation array asterisk asymptotic analysis at sign australia australian english b backslash basque language because bit bracket c canada caret cascading style sheets chinese language circumflex close-mid back unrounded vowel concatenation d dash degree symbol diacritic direct current e east asian languages electronics elision ellipsis emacs english language equivalence relation estonian language exclamation mark f file allocation table filename mangling finnish language france french language g galician language geometry german language germany google search grapheme greek diacritics guillemets h hindi history of the latin alphabet home directory hyphen i icelandic language india indigenous languages of the americas inform integer international phonetic alphabet interpunct interrobang inverted question and exclamation marks irony mark italian language j jargon file juggling juggling notation k keyboard layout l latex latin latin alphabet latin characters in unicode lexicography list of latin letters lithuanian language logic lozenge m macintosh mapudungun mathematics mediawiki microsoft microsoft windows mills mess n nasalization negation nheengatu norwegian language number number sign numero sign o option key order of magnitude p palaeography palatal nasal perl pilcrow pitch accent portuguese language postgresql probability probability theory programming language punctuation q quake question mark quotation mark r random variable regular expression roman numerals s sql sarcasm mark scribal abbreviation section sign semicolon similarity spanish language statistics subtraction swedish language switzerland t therefore sign tittle triangle turkish language typing typography u unicode uniform resource locator united kingdom united states unix unix shell unreal v velar nasal velarization vietnamese language w word divider world wide web x y z