# HTML ASCII 参考手册 **HTML 和 XHTML 用标准的 7 比特 ASCII 代码在网络上传输数据。** **7 比特 ASCII 代码可提供 128 个不同的字符值。** ## 7 比特 可显示的 ASCII 代码 | 结果 | 描述 | 实体编号 | | --- | --- | --- | | space |   |   | | ! | exclamation mark | ! | | " | quotation mark | " | | # | number sign | # | | $ | dollar sign | $ | | % | percent sign | % | | & | ampersand | & | | ' | apostrophe | ' | | ( | left parenthesis | ( | | ) | right parenthesis | ) | | * | asterisk | * | | + | plus sign | + | | , | comma | , | | - | hyphen | - | | . | period | . | | / | slash | / | | 0 | digit 0 | 0 | | 1 | digit 1 | 1 | | 2 | digit 2 | 2 | | 3 | digit 3 | 3 | | 4 | digit 4 | 4 | | 5 | digit 5 | 5 | | 6 | digit 6 | 6 | | 7 | digit 7 | 7 | | 8 | digit 8 | 8 | | 9 | digit 9 | 9 | | : | colon | : | | ; | semicolon | &#59; | | < | less-than | < | | = | equals-to | = | | > | greater-than | > | | ? | question mark | ? | | @ | at sign | @ | | A | uppercase A | A | | B | uppercase B | B | | C | uppercase C | C | | D | uppercase D | D | | E | uppercase E | E | | F | uppercase F | F | | G | uppercase G | G | | H | uppercase H | H | | I | uppercase I | I | | J | uppercase J | J | | K | uppercase K | K | | L | uppercase L | L | | M | uppercase M | M | | N | uppercase N | N | | O | uppercase O | O | | P | uppercase P | P | | Q | uppercase Q | Q | | R | uppercase R | R | | S | uppercase S | S | | T | uppercase T | T | | U | uppercase U | U | | V | uppercase V | V | | W | uppercase W | W | | X | uppercase X | X | | Y | uppercase Y | Y | | Z | uppercase Z | Z | | [ | left square bracket | [ | | \ | backslash | \ | | ] | right square bracket | ] | | ^ | caret | ^ | | _ | underscore | _ | | ` | grave accent | ` | | a | lowercase a | a | | b | lowercase b | b | | c | lowercase c | c | | d | lowercase d | d | | e | lowercase e | e | | f | lowercase f | f | | g | lowercase g | g | | h | lowercase h | h | | i | lowercase i | i | | j | lowercase j | j | | k | lowercase k | k | | l | lowercase l | l | | m | lowercase m | m | | n | lowercase n | n | | o | lowercase o | o | | p | lowercase p | p | | q | lowercase q | q | | r | lowercase r | r | | s | lowercase s | s | | t | lowercase t | t | | u | lowercase u | u | | v | lowercase v | v | | w | lowercase w | w | | x | lowercase x | x | | y | lowercase y | y | | z | lowercase z | z | | { | left curly brace | { | | | | vertical bar | | | | } | right curly brace | } | | ~ | tilde | ~ | ## 7 比特 设备控制 ASCII代码 ASCII设备控制代码最初被设计为用来控制诸如打印机和磁带驱动器之类的硬件设备。在HTML文档中这些代码不会起任何作用。 | 结果 | 描述 | 实体编号 | | --- | --- | --- | | NUL | null character | � | | SOH | start of header |  | | STX | start of text |  | | ETX | end of text |  | | EOT | end of transmission |  | | ENQ | enquiry |  | | ACK | acknowledge |  | | BEL | bell (ring) |  | | BS | backspace |  | | HT | horizontal tab | 	 | | LF | line feed | 
 | | VT | vertical tab |  | | FF | form feed |  | | CR | carriage return | 
 | | SO | shift out |  | | SI | shift in |  | | DLE | data link escape |  | | DC1 | device control 1 |  | | DC2 | device control 2 |  | | DC3 | device control 3 |  | | DC4 | device control 4 |  | | NAK | negative acknowledge |  | | SYN | synchronize |  | | ETB | end transmission block |  | | CAN | cancel |  | | EM | end of medium |  | | SUB | substitute |  | | ESC | escape |  | | FS | file separator |  | | GS | group separator |  | | RS | record separator |  | | US | unit separator |  | | DEL | delete (rubout) |  |