Portable Character Set is a set of 103 characters which, according to the POSIX standard, must be present in any character set. Compared to ASCII, the Portable Character Set lacks some control characters, and does not prescribe any particular value encoding. The Portable Character Set is a superset of the Basic Execution Character Set as defined by ANSI C.
| name | glyph | C string | Unicode | Unicode name |
|---|---|---|---|---|
| NUL | \0 | U+0000 | NULL (NUL) | |
| alert | \a | U+0007 | ALERT (BEL) | |
| backspace | \b | U+0008 | BACKSPACE (BS) | |
| tab | \t | U+0009 | CHARACTER TABULATION (HT) | |
| newline | \n | U+000A | LINE FEED (LF) | |
| vertical-tab | \v | U+000B | LINE TABULATION (VT) | |
| form-feed | \f | U+000C | FORM FEED (FF) | |
| carriage-return | \r | U+000D | CARRIAGE RETURN (CR) | |
| space | U+0020 | SPACE | ||
| exclamation-mark | ! | ! | U+0021 | EXCLAMATION MARK |
| quotation-mark | " | \" | U+0022 | QUOTATION MARK |
| number-sign | # | # | U+0023 | NUMBER SIGN |
| dollar-sign | $ | $ | U+0024 | DOLLAR SIGN |
| percent-sign | % | % | U+0025 | PERCENT SIGN |
| ampersand | & | & | U+0026 | AMPERSAND |
| apostrophe | ' | \' | U+0027 | APOSTROPHE |
| left-parenthesis | ( | ( | U+0028 | LEFT PARENTHESIS |
| right-parenthesis | ) | ) | U+0029 | RIGHT PARENTHESIS |
| asterisk | * | * | U+002A | ASTERISK |
| plus-sign | + | + | U+002B | PLUS SIGN |
| comma | , | , | U+002C | COMMA |
| hyphen | - | - | U+002D | HYPHEN-MINUS |
| period | . | . | U+002E | FULL STOP |
| slash | / | / | U+002F | SOLIDUS |
| zero | 0 | 0 | U+0030 | DIGIT ZERO |
| one | 1 | 1 | U+0031 | DIGIT ONE |
| two | 2 | 2 | U+0032 | DIGIT TWO |
| three | 3 | 3 | U+0033 | DIGIT THREE |
| four | 4 | 4 | U+0034 | DIGIT FOUR |
| five | 5 | 5 | U+0035 | DIGIT FIVE |
| six | 6 | 6 | U+0036 | DIGIT SIX |
| seven | 7 | 7 | U+0037 | DIGIT SEVEN |
| eight | 8 | 8 | U+0038 | DIGIT EIGHT |
| nine | 9 | 9 | U+0039 | DIGIT NINE |
| colon | : | : | U+003A | COLON |
| semicolon | ; | ; | U+003B | SEMICOLON |
| less-than-sign | < | < | U+003C | LESS-THAN SIGN |
| equals-sign | = | = | U+003D | EQUALS SIGN |
| greater-than-sign | > | > | U+003E | GREATER-THAN SIGN |
| question-mark | ? | ? | U+003F | QUESTION MARK |
| commercial-at | @ | @ | U+0040 | COMMERCIAL AT |
| A | A | A | U+0041 | LATIN CAPITAL LETTER A |
| B | B | B | U+0042 | LATIN CAPITAL LETTER B |
| C | C | C | U+0043 | LATIN CAPITAL LETTER C |
| D | D | D | U+0044 | LATIN CAPITAL LETTER D |
| E | E | E | U+0045 | LATIN CAPITAL LETTER E |
| F | F | F | U+0046 | LATIN CAPITAL LETTER F |
| G | G | G | U+0047 | LATIN CAPITAL LETTER G |
| H | H | H | U+0048 | LATIN CAPITAL LETTER H |
| I | I | I | U+0049 | LATIN CAPITAL LETTER I |
| J | J | J | U+004A | LATIN CAPITAL LETTER J |
| K | K | K | U+004B | LATIN CAPITAL LETTER K |
| L | L | L | U+004C | LATIN CAPITAL LETTER L |
| M | M | M | U+004D | LATIN CAPITAL LETTER M |
| N | N | N | U+004E | LATIN CAPITAL LETTER N |
| O | O | O | U+004F | LATIN CAPITAL LETTER O |
| P | P | P | U+0050 | LATIN CAPITAL LETTER P |
| Q | Q | Q | U+0051 | LATIN CAPITAL LETTER Q |
| R | R | R | U+0052 | LATIN CAPITAL LETTER R |
| S | S | S | U+0053 | LATIN CAPITAL LETTER S |
| T | T | T | U+0054 | LATIN CAPITAL LETTER T |
| U | U | U | U+0055 | LATIN CAPITAL LETTER U |
| V | V | V | U+0056 | LATIN CAPITAL LETTER V |
| W | W | W | U+0057 | LATIN CAPITAL LETTER W |
| X | X | X | U+0058 | LATIN CAPITAL LETTER X |
| Y | Y | Y | U+0059 | LATIN CAPITAL LETTER Y |
| Z | Z | Z | U+005A | LATIN CAPITAL LETTER Z |
| left-square-bracket | [ | [ | U+005B | LEFT SQUARE BRACKET |
| backslash | \ | \\ | U+005C | REVERSE SOLIDUS |
| right-square-bracket | ] | ] | U+005D | RIGHT SQUARE BRACKET |
| circumflex | ^ | ^ | U+005E | CIRCUMFLEX ACCENT |
| underscore | _ | _ | U+005F | LOW LINE |
| grave-accent | ` | ` | U+0060 | GRAVE ACCENT |
| a | a | a | U+0061 | LATIN SMALL LETTER A |
| b | b | b | U+0062 | LATIN SMALL LETTER B |
| c | c | c | U+0063 | LATIN SMALL LETTER C |
| d | d | d | U+0064 | LATIN SMALL LETTER D |
| e | e | e | U+0065 | LATIN SMALL LETTER E |
| f | f | f | U+0066 | LATIN SMALL LETTER F |
| g | g | g | U+0067 | LATIN SMALL LETTER G |
| h | h | h | U+0068 | LATIN SMALL LETTER H |
| i | i | i | U+0069 | LATIN SMALL LETTER I |
| j | j | j | U+006A | LATIN SMALL LETTER J |
| k | k | k | U+006B | LATIN SMALL LETTER K |
| l | l | l | U+006C | LATIN SMALL LETTER L |
| m | m | m | U+006D | LATIN SMALL LETTER M |
| n | n | n | U+006E | LATIN SMALL LETTER N |
| o | o | o | U+006F | LATIN SMALL LETTER O |
| p | p | p | U+0070 | LATIN SMALL LETTER P |
| q | q | q | U+0071 | LATIN SMALL LETTER Q |
| r | r | r | U+0072 | LATIN SMALL LETTER R |
| s | s | s | U+0073 | LATIN SMALL LETTER S |
| t | t | t | U+0074 | LATIN SMALL LETTER T |
| u | u | u | U+0075 | LATIN SMALL LETTER U |
| v | v | v | U+0076 | LATIN SMALL LETTER V |
| w | w | w | U+0077 | LATIN SMALL LETTER W |
| x | x | x | U+0078 | LATIN SMALL LETTER X |
| y | y | y | U+0079 | LATIN SMALL LETTER Y |
| z | z | z | U+007A | LATIN SMALL LETTER Z |
| left-brace | { | { | U+007B | LEFT CURLY BRACKET |
| vertical-line | | | | | U+007C | VERTICAL LINE |
| right-brace | } | } | U+007D | RIGHT CURLY BRACKET |
| tilde | ~ | ~ | U+007E | TILDE |
Character Classes
Characters grouped by their class.
| Unicode range | Character Class | POSIX.1-2017 Standard |
|---|---|---|
| U+0000 | Control | Portable |
| U+0001 to U+0006 | Control | Non-Portable |
| U+0007 to U+0008 | Control | Portable |
| U+0009 to U+000D | White-space | Portable |
| U+0010 to U+001F | Control | Non-Portable |
| U+0020 | White-space | Portable |
| U+0021 to U+002F | Punctuation | Portable |
| U+0030 to U+0039 | Digit | Portable |
| U+003A to U+0040 | Punctuation | Portable |
| U+0041 to U+005A | Uppercase Letter | Portable |
| U+005B to U+0060 | Punctuation | Portable |
| U+0061 to U+007A | lowercase letter | Portable |
| U+007B to U+007E | Punctuation | Portable |
References
- "The Open Group Base Specifications Issue 7, 2018 edition". IEEE and The Open Group. 2018. Retrieved 2018-03-21.
- "The Open Group Base Specifications Issue 6". IEEE and The Open Group. 2004. Retrieved 18 August 2014.
- "Working draft — ISO/IEC 9899:202x, Information technology — Programming languages — C, § 5.2.1" (PDF). International Organization for Standardization. 2018. Retrieved 2020-08-03.
- "American National Standard Code for Information Interchange | ANSI X3.4-1977" (PDF). National Institute for Standards. 1977. Archived (PDF) from the original on 2022-10-09. (facsimile, not machine readable)