Appendix D: ASCII Subset of Unicode
The following chart shows the ordering of characters in the ASCII (American Standard Code for Information Interchange) subset of Unicode. The internal representation for each character is shown in decimal. For example, the letter A is represented internally as the integer 65. The space (blank) character is denoted by a “□”.
| ASCII | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Left Digit(s) | Right Digit | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |
| 0 | NUL | SOH | STX | ETX | EOT | ENQ | ACK | BEL | BS | HT | ||
| 1 | LF | VT | FF | CR | SO | SI | DLE | DC1 | DC2 | DC3 | ||
| 2 | DC4 | NAK | SYN | ETB | CAN | EM | SUB | ESC | FS | GS | ||
| 3 | RS | US | □ | ! | “ | # | $ | % | & | ´ | ||
| 4 | ( | ) | * | + | , | – | . | / | 0 | 1 | ||
| 5 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | : | ; | ||
| 6 | < | = | > | ? | @ | A | B | C | D | E | ||
| 7 | F | G | H | I | J | K | L | M | N | O | ||
| 8 | P | Q | R | S | T | U | V | W | X | Y | ||
| 9 | Z | [ | ] | ^ | _ | ` | a | b | c | |||
| 10 | d | e | f | g | h | i | j | k | l | m | ||
| 11 | n | o | p | q | r | s | t | u | v | w | ||
| 12 | x | y | z | { | | | } | ~ | DEL | ||||
Codes 00–31 and 127 are the following nonprintable control characters:
| 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 character (beep) |
| BS | Back space |
| 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 one |
| DC2 | Device control two |
| DC3 | Device control three |
| DC4 | Device control four |
| NAK | Negative acknowledge |
| SYN | Synchronous idle |
| ETB | End of transmitted 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 |
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