====== ASCII American Standard Code for Information Interchange ======
~~NOTOC~~
===== Control Codes =====
These are non printable characters that control the operation of the communication equipment:\\ \\ 
| **Hex** | **Dec** | **Code** | **Description** | | **Hex** | **Dec** | **Code** | **Description** |
| 00 | 0 | NUL | Null | | 10 | 16 | DLE | Data Line Escape |
| 01 | 1 | SOH | Start of Heading | | 11 | 17 | DC1 | X On |
| 02 | 2 | STX | Start of Text | | 12 | 18 | DC2 | Aux On |
| 03 | 3 | ETX | End of Text | | 13 | 19 | DC3 | X Off |
| 04 | 4 | EOT | End of Transmit | | 14 | 20 | DC4 | Aux Off |
| 05 | 5 | ENQ | Enquiry | | 15 | 21 | NAK | Negative Acknowledge |
| 06 | 6 | ACK | Acknowledge | | 16 | 22 | SYN | Synchronous File |
| 07 | 7 | BEL | Bell | | 17 | 23 | ETB | End of Transmitted Block |
| 08 | 8 | BS | Backspace | | 18 | 24 | CAN | Cancel |
| 09 | 9 | HT | Horizontal Tab | | 19 | 25 | EM | End of Medium |
| 0A | 10 | LF | Line Feed | | 1A | 26 | SUB | Substitute |
| 0B | 11 | VT | Vertical Tab | | 1B | 27 | ESC | Escape |
| 0C | 12 | FF | Form Feed | | 1C | 28 | FS | File Separator |
| 0D | 13 | CR | Carriage Return | | 1D | 29 | GS | Group Separator |
| 0E | 14 | SO | Shift Out | | 1E | 30 | RS | Record Separator |
| 0F | 15 | SI | Shift In | | 1F | 31 | US | Unit Separator |
===== Text Codes =====

| **Hex** | **Dec** | **Code** | | **Hex** | **Dec** | **Code** | | **Hex** | **Dec** | **Code**|
| 20 | 32 | Space | | 30 | 48 | 0 | | 40 | 64 | @ |
| 21 | 33 | ! | | 31 | 49 | 1 | | 41 | 65 | A |
| 22 | 34 | " | | 32 | 50 | 2 | | 42 | 66 | B |
| 23 | 35 | # | | 33 | 51 | 3 | | 43 | 67 | C |
| 24 | 36 | $ | | 34 | 52 | 4 | | 44 | 68 | D |
| 25 | 37 | % | | 35 | 53 | 5 | | 45 | 69 | E |
| 26 | 38 | & | | 36 | 54 | 6 | | 46 | 70 | F |
| 27 | 39 | ' | | 37 | 55 | 7 | | 47 | 71 | G |
| 28 | 40 | ( | | 38 | 56 | 8 | | 48 | 72 | H |
| 29 | 41 | ) | | 39 | 57 | 9 | | 49 | 73 | I |
| 2A | 42 | * | | 3A | 58 | : | | 4A | 74 | J |
| 2B | 43 | + | | 3B | 59 | ; | | 4B | 75 | K |
| 2C | 44 | , | | 3C | 60 | < | | 4C | 76 | L |
| 2D | 45 | - | | 3D | 61 | = | | 4D | 77 | M |
| 2E | 46 | . | | 3E | 62 | > | | 4E | 78 | N |
| 2F | 47 | / | | 3F | 63 | ? | | 4F | 79 | O |

| **Hex** | **Dec** | **Code**| | **Hex** | **Dec** | **Code**| | **Hex** | **Dec** | **Code**|
| 50 | 80 | P | | 60 | 96 | ' | | 70 | 112 | p |
| 51 | 81 | Q | | 61 | 97 | a | | 71 | 113 | q |
| 52 | 82 | R | | 62 | 98 | b | | 72 | 114 | r |
| 53 | 83 | S | | 63 | 99 | c | | 73 | 115 | s |
| 54 | 84 | T | | 64 | 100 | d | | 74 | 116 | t |
| 55 | 85 | U | | 65 | 101 | e | | 75 | 117 | u |
| 56 | 86 | V | | 66 | 102 | f | | 76 | 118 | v |
| 57 | 87 | W | | 67 | 103 | g | | 77 | 119 | w |
| 58 | 88 | X | | 68 | 104 | h | | 78 | 120 | x |
| 59 | 89 | Y | | 69 | 105 | i | | 79 | 121 | y |
| 5A | 90 | Z | | 6A | 106 | j | | 7A | 122 | z |
| 5B | 91 | [ | | 6B | 107 | k | | 7B | 123 | { |
| 5C | 92 | \ | | 6C | 108 | l | | 7C | 124 | %%|%% |
| 5D | 93 | ] | | 6D | 109 | m | | 7D | 125 | } |
| 5E | 94 | %%^%% | | 6E | 110 | n | | 7E | 126 | ~ |
| 5F | 95 | _ | | 6F | 111 | o | | 7F | 127 | Del |

Representation of the UK Pound sign '£' is not included in the ASCII set, the actual value used will depend upon the implementation.\\ 
Today, in the age of the World Wide Web a new set of codes is used where each character is represented by 2 bytes of data allowing representation of vast range of country specific characters.\\ \\