American Standard Code for Information Interchange (ASCII) je americký standard pro převod znaků na čísla. Jde o tabulku o 128 řádcích (kód je sedmibitový), kde každý řádek obsahuje znak anglické abecedy (případně znak používaný v informatice) jeho číselný ekvivalent. Prvních 32 znaků je řídích, původně určených pro ovládání různých zařízeni, například tiskáren.
Přestože je ASCII kód dodnes velmi úspěšný, tak je vzhledem k nízkému počtu znaků (i přes rozšíření na 256 znaků (Win-1250, ISO8859-2, Kód Kamenických)) nepoužitelný pro mezinárodní prostředí. Z tohoto důvodu se tato rozšíření ASCII nahrazují Unicodem, jehož tabulka obsahuje přes 100 000 znaků.
Ascii tabulka
| DEC | BIN | OCT | HEX | Znak |
|---|---|---|---|---|
| 0 | 00 | 00 | 0x0 | NULL |
| 1 | 01 | 01 | 0x1 | Start of Header |
| 2 | 010 | 02 | 0x2 | Start of Text |
| 3 | 011 | 03 | 0x3 | End of Text |
| 4 | 0100 | 04 | 0x4 | End of Transmission |
| 5 | 0101 | 05 | 0x5 | Enquiry |
| 6 | 0110 | 06 | 0x6 | Acknowledgment |
| 7 | 0111 | 07 | 0x7 | Bell |
| 8 | 01000 | 010 | 0x8 | Backspace |
| 9 | 01001 | 011 | 0x9 | Horizontal Tab |
| 10 | 01010 | 012 | 0xA | Line Feed |
| 11 | 01011 | 013 | 0xB | Vertical Tab |
| 12 | 01100 | 014 | 0xC | Form Feed |
| 13 | 01101 | 015 | 0xD | Carriage Return |
| 14 | 01110 | 016 | 0xE | Shift Out |
| 15 | 01111 | 017 | 0xF | Shift In |
| 16 | 010000 | 020 | 0x10 | Data Link Escape |
| 17 | 010001 | 021 | 0x11 | Device Control 1 |
| 18 | 010010 | 022 | 0x12 | Device Control 2 |
| 19 | 010011 | 023 | 0x13 | Device Control 3 |
| 20 | 010100 | 024 | 0x14 | Device Control 4 |
| 21 | 010101 | 025 | 0x15 | Negative Acknowledgemnt |
| 22 | 010110 | 026 | 0x16 | Synchronous Idle |
| 23 | 010111 | 027 | 0x17 | End of Trans. Block |
| 24 | 011000 | 030 | 0x18 | Cancel |
| 25 | 011001 | 031 | 0x19 | End of Medium |
| 26 | 011010 | 032 | 0x1A | Substitute |
| 27 | 011011 | 033 | 0x1B | Escape |
| 28 | 011100 | 034 | 0x1C | File Separator |
| 29 | 011101 | 035 | 0x1D | Group Separator |
| 30 | 011110 | 036 | 0x1E | Record Separator |
| 31 | 011111 | 037 | 0x1F | Unit Separator |
| 32 | 0100000 | 040 | 0x20 | Space |
| 33 | 0100001 | 041 | 0x21 | ! |
| 34 | 0100010 | 042 | 0x22 | " |
| 35 | 0100011 | 043 | 0x23 | # |
| 36 | 0100100 | 044 | 0x24 | $ |
| 37 | 0100101 | 045 | 0x25 | % |
| 38 | 0100110 | 046 | 0x26 | & |
| 39 | 0100111 | 047 | 0x27 | ' |
| 40 | 0101000 | 050 | 0x28 | ( |
| 41 | 0101001 | 051 | 0x29 | ) |
| 42 | 0101010 | 052 | 0x2A | * |
| 43 | 0101011 | 053 | 0x2B | + |
| 44 | 0101100 | 054 | 0x2C | , |
| 45 | 0101101 | 055 | 0x2D | - |
| 46 | 0101110 | 056 | 0x2E | . |
| 47 | 0101111 | 057 | 0x2F | / |
| 48 | 0110000 | 060 | 0x30 | 0 |
| 49 | 0110001 | 061 | 0x31 | 1 |
| 50 | 0110010 | 062 | 0x32 | 2 |
| 51 | 0110011 | 063 | 0x33 | 3 |
| 52 | 0110100 | 064 | 0x34 | 4 |
| 53 | 0110101 | 065 | 0x35 | 5 |
| 54 | 0110110 | 066 | 0x36 | 6 |
| 55 | 0110111 | 067 | 0x37 | 7 |
| 56 | 0111000 | 070 | 0x38 | 8 |
| 57 | 0111001 | 071 | 0x39 | 9 |
| 58 | 0111010 | 072 | 0x3A | : |
| 59 | 0111011 | 073 | 0x3B | ; |
| 60 | 0111100 | 074 | 0x3C | < |
| 61 | 0111101 | 075 | 0x3D | = |
| 62 | 0111110 | 076 | 0x3E | > |
| 63 | 0111111 | 077 | 0x3F | ? |
| 64 | 01000000 | 0100 | 0x40 | @ |
| 65 | 01000001 | 0101 | 0x41 | A |
| 66 | 01000010 | 0102 | 0x42 | B |
| 67 | 01000011 | 0103 | 0x43 | C |
| 68 | 01000100 | 0104 | 0x44 | D |
| 69 | 01000101 | 0105 | 0x45 | E |
| 70 | 01000110 | 0106 | 0x46 | F |
| 71 | 01000111 | 0107 | 0x47 | G |
| 72 | 01001000 | 0110 | 0x48 | H |
| 73 | 01001001 | 0111 | 0x49 | I |
| 74 | 01001010 | 0112 | 0x4A | J |
| 75 | 01001011 | 0113 | 0x4B | K |
| 76 | 01001100 | 0114 | 0x4C | L |
| 77 | 01001101 | 0115 | 0x4D | M |
| 78 | 01001110 | 0116 | 0x4E | N |
| 79 | 01001111 | 0117 | 0x4F | O |
| 80 | 01010000 | 0120 | 0x50 | P |
| 81 | 01010001 | 0121 | 0x51 | Q |
| 82 | 01010010 | 0122 | 0x52 | R |
| 83 | 01010011 | 0123 | 0x53 | S |
| 84 | 01010100 | 0124 | 0x54 | T |
| 85 | 01010101 | 0125 | 0x55 | U |
| 86 | 01010110 | 0126 | 0x56 | V |
| 87 | 01010111 | 0127 | 0x57 | W |
| 88 | 01011000 | 0130 | 0x58 | X |
| 89 | 01011001 | 0131 | 0x59 | Y |
| 90 | 01011010 | 0132 | 0x5A | Z |
| 91 | 01011011 | 0133 | 0x5B | [ |
| 92 | 01011100 | 0134 | 0x5C | \\ |
| 93 | 01011101 | 0135 | 0x5D | ] |
| 94 | 01011110 | 0136 | 0x5E | ^ |
| 95 | 01011111 | 0137 | 0x5F | _ |
| 96 | 01100000 | 0140 | 0x60 | ` |
| 97 | 01100001 | 0141 | 0x61 | a |
| 98 | 01100010 | 0142 | 0x62 | b |
| 99 | 01100011 | 0143 | 0x63 | c |
| 100 | 01100100 | 0144 | 0x64 | d |
| 101 | 01100101 | 0145 | 0x65 | e |
| 102 | 01100110 | 0146 | 0x66 | f |
| 103 | 01100111 | 0147 | 0x67 | g |
| 104 | 01101000 | 0150 | 0x68 | h |
| 105 | 01101001 | 0151 | 0x69 | i |
| 106 | 01101010 | 0152 | 0x6A | j |
| 107 | 01101011 | 0153 | 0x6B | k |
| 108 | 01101100 | 0154 | 0x6C | l |
| 109 | 01101101 | 0155 | 0x6D | m |
| 110 | 01101110 | 0156 | 0x6E | n |
| 111 | 01101111 | 0157 | 0x6F | o |
| 112 | 01110000 | 0160 | 0x70 | p |
| 113 | 01110001 | 0161 | 0x71 | q |
| 114 | 01110010 | 0162 | 0x72 | r |
| 115 | 01110011 | 0163 | 0x73 | s |
| 116 | 01110100 | 0164 | 0x74 | t |
| 117 | 01110101 | 0165 | 0x75 | u |
| 118 | 01110110 | 0166 | 0x76 | v |
| 119 | 01110111 | 0167 | 0x77 | w |
| 120 | 01111000 | 0170 | 0x78 | x |
| 121 | 01111001 | 0171 | 0x79 | y |
| 122 | 01111010 | 0172 | 0x7A | z |
| 123 | 01111011 | 0173 | 0x7B | { |
| 124 | 01111100 | 0174 | 0x7C | | |
| 125 | 01111101 | 0175 | 0x7D | } |
| 126 | 01111110 | 0176 | 0x7E | ~ |
| 127 | 01111111 | 0177 | 0x7F | Delete |