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ASCII Characters
ASCII - The American Standard Code for Information Interchange was established to achieve compatibility between various types of data processing equipment. ASCII, pronounced "ask-key", has become the common code for microcomputer equipment. The standard ASCII character set consists of 128 decimal numbers ranging from zero through 127 assigned to letters, numbers, punctuation marks, and the most common special characters e.g. @. The first 32 are non printing characters that were originally developed for use with teletypers. The Extended ASCII Character Set also consists of 128 decimal numbers and ranges from 128 through 255 representing additional special, mathematical, graphic, and foreign characters.
| Decimal | Hexa | Character | Description |
| 0 | 0 | | Null |
| 1 | 1 | | Start of Heading |
| 2 | 2 | | Start of Text |
| 3 | 3 | | End of Text |
| 4 | 4 | | End of Transmission |
| 5 | 5 | | Enquiry |
| 6 | 6 | | Acknowledge |
| 7 | 7 | | Bell |
| 8 | 8 | | Backspace |
| 9 | 9 | | Horizontal Tab |
| 10 | A | | New Line |
| 11 | B | | Vertical Tab |
| 12 | C | | New Page |
| 13 | D | | Carriage Return |
| 14 | E | | Shift Out |
| 15 | F | | Shift In |
| 16 | 10 | | Data Link Escape |
| 17 | 11 | | Device Control No 1 |
| 18 | 12 | | Device Control No 2 |
| 19 | 13 | | Device Control No 3 |
| 20 | 14 | | Device Control No 4 |
| 21 | 15 | | Negative Acknowledge |
| 22 | 16 | | Synchronous Idle |
| 23 | 17 | | End of Transmission |
| 24 | 18 | | Cancel |
| 25 | 19 | | End of Medium |
| 26 | 1A | | Substitute |
| 27 | 1B | | Escape |
| 28 | 1C | | File Separator |
| 29 | 1D | | Group Separator |
| 30 | 1E | | Record Separator |
| 31 | 1F | | Unit Sparator |
| 32 | 20 | | Space |
| 33 | 21 | ! | Exclamation Mark |
| 34 | 22 | " | Double Quotes |
| 35 | 23 | # | Hash |
| 36 | 24 | $ | Dollar |
| 37 | 25 | % | Percent |
| 38 | 26 | & | Ampersand |
| 39 | 27 | ' | Single Quote |
| 40 | 28 | ( | Open Bracket |
| 41 | 29 | ) | Close Bracket |
| 42 | 2A | * | Star |
| 43 | 2B | + | Plus symbol |
| 44 | 2C | , | Comma |
| 45 | 2D | - | Minus symbol |
| 46 | 2E | . | Full Stop |
| 47 | 2F | / | |
| 48 | 30 | 0 | |
| 49 | 31 | 1 | |
| 50 | 32 | 2 | |
| 51 | 33 | 3 | |
| 52 | 34 | 4 | |
| 53 | 35 | 5 | |
| 54 | 36 | 6 | |
| 55 | 37 | 7 | |
| 56 | 38 | 8 | |
| 57 | 39 | 9 | |
| 58 | 3A | : | |
| 59 | 3B | ; | |
| 60 | 3C | < | |
| 61 | 3D | = | |
| 62 | 3E | > | |
| 63 | 3F | ? | |
| 64 | 40 | @ | |
| 65 | 41 | A | |
| 66 | 42 | B | |
| 67 | 43 | C | |
| 68 | 44 | D | |
| 69 | 45 | E | |
| 70 | 46 | F | |
| 71 | 47 | G | |
| 72 | 48 | H | |
| 73 | 49 | I | |
| 74 | 4A | J | |
| 75 | 4B | K | |
| 76 | 4C | L | |
| 77 | 4D | M | |
| 78 | 4E | N | |
| 79 | 4F | O | |
| 80 | 50 | P | |
| 81 | 51 | Q | |
| 82 | 52 | R | |
| 83 | 53 | S | |
| 84 | 54 | T | |
| 85 | 55 | U | |
| 86 | 56 | V | |
| 87 | 57 | W | |
| 88 | 58 | X | |
| 89 | 59 | Y | |
| 90 | 5A | Z | |
| 91 | 5B | [ | |
| 92 | 5C | \ | |
| 93 | 5D | ] | |
| 94 | 5E | ^ | |
| 95 | 5F | _ | Underscore |
| 96 | 60 | ` | Apostrophe |
| 97 | 61 | a | |
| 98 | 62 | b | |
| 99 | 63 | c | |
| 100 | 64 | d | |
| 101 | 65 | e | |
| 102 | 66 | f | |
| 103 | 67 | g | |
| 104 | 68 | h | |
| 105 | 69 | i | |
| 106 | 6A | j | |
| 107 | 6B | k | |
| 108 | 6C | l | |
| 109 | 6D | m | |
| 110 | 6E | n | |
| 111 | 6F | o | |
| 112 | 70 | p | |
| 113 | 71 | q | |
| 114 | 72 | r | |
| 115 | 73 | s | |
| 116 | 74 | t | |
| 117 | 75 | u | |
| 118 | 76 | v | |
| 119 | 77 | w | |
| 120 | 78 | x | |
| 121 | 79 | y | |
| 122 | 7A | z | |
| 123 | 7B | { | |
| 124 | 7C | | | |
| 125 | 7D | } | |
| 126 | 7E | ~ | |
| 127 | 7F | | DEL |
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