Zmiany
Ponieważ kod ASCII jest 7-[[bit]]owy, a większość komputerów używa [[bajt]]ów 8-bitowych, dodatkowy bit wykorzystano do powiększenia zbioru kodowanych znaków do 256 symboli. <br />Powstało wiele różnych rozszerzeń ASCII wykorzystujących ósmy bit (np. rozszerzenia firm IBM lub Microsoft), nazywanych stronami kodowymi. Kodowanie [[UTF-8]] można także uznać za rozszerzenie ASCII, jednak w nim dodatkowe znaki są kodowane na 2 i więcej bajtach.
== Tabela kodów ASCII ==
{| class="wikitable"
|-align=center
! DEC || HEX || Znak || DEC || HEX || Znak || DEC || HEX || Znak || DEC || HEX || Znak
|-align=center
| style="background:#e8e8e8" | 0 || 00
| style="text-align:left;"| Null
| style="background:#e8e8e8;" | 32 || 20 || Spacja
| style="background:#e8e8e8;" | 64 || 40 || @
| style="background:#e8e8e8;" | 96 || 60 || `
|-align=center
| style="background:#e8e8e8;" | 1 || 01
| style="text-align:left;" | Start Of Heading
| style="background:#e8e8e8;" | 33 || 21 || !
| style="background:#e8e8e8;" | 65 || 41 || A
| style="background:#e8e8e8;" | 97 || 61 || a
|-align=center
| style="background:#e8e8e8;" | 2 || 02
| style="text-align:left;" | Start of Text
| style="background:#e8e8e8;" | 34 || 22 || "
| style="background:#e8e8e8;" | 66 || 42 || B
| style="background:#e8e8e8;" | 98 || 62 || b
|-align=center
| style="background:#e8e8e8;" | 3 || 03
| style="text-align:left;" | End of Text
| style="background:#e8e8e8;" | 35 || 23 || #
| style="background:#e8e8e8;" | 67 || 43 || C
| style="background:#e8e8e8;" | 99 || 63 || c
|-align=center
| style="background:#e8e8e8;" | 4 || 04
| style="text-align:left;" | End of Transmission
| style="background:#e8e8e8;" | 36 || 24 || $
| style="background:#e8e8e8;" | 68 || 44 || D
| style="background:#e8e8e8;" | 100 || 64 || d
|-align=center
| style="background:#e8e8e8;" | 5 || 05
| style="text-align:left;" | Enquiry
| style="background:#e8e8e8;" | 37 || 25 || %
| style="background:#e8e8e8;" | 69 || 45 || E
| style="background:#e8e8e8;" | 101 || 65 || e
|-align=center
| style="background:#e8e8e8;" | 6 || 06
| style="text-align:left;" | Acknowledge
| style="background:#e8e8e8;" | 38 || 26 || &
| style="background:#e8e8e8;" | 70 || 46 || F
| style="background:#e8e8e8;" | 102 || 66 || f
|-align=center
| style="background:#e8e8e8;" | 7 || 07
| style="text-align:left;" | Bell
| style="background:#e8e8e8;" | 39 || 27 || '
| style="background:#e8e8e8;" | 71 || 47 || G
| style="background:#e8e8e8;" | 103 || 67 || g
|-align=center
| style="background:#e8e8e8;" | 8 || 08
| style="text-align:left;" | Backspace
| style="background:#e8e8e8;" | 40 || 28 || (
| style="background:#e8e8e8;" | 72 || 48 || H
| style="background:#e8e8e8;" | 104 || 68 || h
|-align=center
| style="background:#e8e8e8;" | 9 || 09
| style="text-align:left;" | Horizontal Tab
| style="background:#e8e8e8;" | 41 || 29 || )
| style="background:#e8e8e8;" | 73 || 49 || I
| style="background:#e8e8e8;" | 105 || 69 || i
|-align=center
| style="background:#e8e8e8;" | 10 || 0A
| style="text-align:left;" | Line Feed
| style="background:#e8e8e8;" | 42 || 2A || *
| style="background:#e8e8e8;" | 74 || 4A || J
| style="background:#e8e8e8;" | 106 || 6A || j
|-align=center
| style="background:#e8e8e8;" | 11 || 0B
| style="text-align:left;" | Vertical Tab
| style="background:#e8e8e8;" | 43 || 2B || +
| style="background:#e8e8e8;" | 75 || 4B || K
| style="background:#e8e8e8;" | 107 || 6B || k
|-align=center
| style="background:#e8e8e8;" | 12 || 0C
| style="text-align:left;" | Form Feed
| style="background:#e8e8e8;" | 44 || 2C || ,
| style="background:#e8e8e8;" | 76 || 4C || L
| style="background:#e8e8e8;" | 108 || 6C || l
|-align=center
| style="background:#e8e8e8;" | 13 || 0D
| style="text-align:left;" | Carriage Return
| style="background:#e8e8e8;" | 45 || 2D || -
| style="background:#e8e8e8;" | 77 || 4D || M
| style="background:#e8e8e8;" | 109 || 6D || m
|-align=center
| style="background:#e8e8e8;" | 14 || 0E
| style="text-align:left;" | Shift Out
| style="background:#e8e8e8;" | 46 || 2E || .
| style="background:#e8e8e8;" | 78 || 4E || N
| style="background:#e8e8e8;" | 110 || 6E || n
|-align=center
| style="background:#e8e8e8;" | 15 || 0F
| style="text-align:left;" | Shift In
| style="background:#e8e8e8;" | 47 || 2F || /
| style="background:#e8e8e8;" | 79 || 4F || O
| style="background:#e8e8e8;" | 111 || 6F || o
|-align=center
| style="background:#e8e8e8;" | 16 || 10
| style="text-align:left;" | Data Link Escape
| style="background:#e8e8e8;" | 48 || 30 || 0
| style="background:#e8e8e8;" | 80 || 50 || P
| style="background:#e8e8e8;" | 112 || 70 || p
|-align=center
| style="background:#e8e8e8;" | 17 || 11
| style="text-align:left;" | Device Control 1 (XON)
| style="background:#e8e8e8;" | 49 || 31 || 1
| style="background:#e8e8e8;" | 81 || 51 || Q
| style="background:#e8e8e8;" | 113 || 71 || q
|-align=center
| style="background:#e8e8e8;" | 18 || 12
| style="text-align:left;" | Device Control 2
| style="background:#e8e8e8;" | 50 || 32 || 2
| style="background:#e8e8e8;" | 82 || 52 || R
| style="background:#e8e8e8;" | 114 || 72 || r
|-align=center
| style="background:#e8e8e8;" | 19 || 13
| style="text-align:left;" | Device Control 3 (XOFF)
| style="background:#e8e8e8;" | 51 || 33 || 3
| style="background:#e8e8e8;" | 83 || 53 || S
| style="background:#e8e8e8;" | 115 || 73 || s
|-align=center
| style="background:#e8e8e8;" | 20 || 14
| style="text-align:left;" | Device Control 4
| style="background:#e8e8e8;" | 52 || 34 || 4
| style="background:#e8e8e8;" | 84 || 54 || T
| style="background:#e8e8e8;" | 116 || 74 || t
|-align=center
| style="background:#e8e8e8;" | 21 || 15
| style="text-align:left;" | Negative Acknowledge
| style="background:#e8e8e8;" | 53 || 35 || 5
| style="background:#e8e8e8;" | 85 || 55 || U
| style="background:#e8e8e8;" | 117 || 75 || u
|-align=center
| style="background:#e8e8e8;" | 22 || 16
| style="text-align:left;" | Synchronous Idle
| style="background:#e8e8e8;" | 54 || 36 || 6
| style="background:#e8e8e8;" | 86 || 56 || V
| style="background:#e8e8e8;" | 118 || 76 || v
|-align=center
| style="background:#e8e8e8;" | 23 || 17
| style="text-align:left;" | End of Transmission Block
| style="background:#e8e8e8;" | 55 || 37 || 7
| style="background:#e8e8e8;" | 87 || 57 || W
| style="background:#e8e8e8;" | 119 || 77 || w
|-align=center
| style="background:#e8e8e8;" | 24 || 18
| style="text-align:left;" | Cancel
| style="background:#e8e8e8;" | 56 || 38 || 8
| style="background:#e8e8e8;" | 88 || 58 || X
| style="background:#e8e8e8;" | 120 || 78 || x
|-align=center
| style="background:#e8e8e8;" | 25 || 19
| style="text-align:left;" | End of Medium
| style="background:#e8e8e8;" | 57 || 39 || 9
| style="background:#e8e8e8;" | 89 || 59 || Y
| style="background:#e8e8e8;" | 121 || 79 || y
|-align=center
| style="background:#e8e8e8;" | 26 || 1A
| style="text-align:left;" | Substitute
| style="background:#e8e8e8;" | 58 || 3A || :
| style="background:#e8e8e8;" | 90 || 5A || Z
| style="background:#e8e8e8;" | 122 || 7A || z
|-align=center
| style="background:#e8e8e8;" | 27 || 1B
| style="text-align:left;" | Escape
| style="background:#e8e8e8;" | 59 || 3B || ;
| style="background:#e8e8e8;" | 91 || 5B || [
| style="background:#e8e8e8;" | 123 || 7B || {
|-align=center
| style="background:#e8e8e8;" | 28 || 1C
| style="text-align:left;" | File Separator
| style="background:#e8e8e8;" | 60 || 3C || <
| style="background:#e8e8e8;" | 92 || 5C || \
| style="background:#e8e8e8;" | 124 || 7C || |
|-align=center
| style="background:#e8e8e8;" | 29 || 1D
| style="text-align:left;" | Group Separator
| style="background:#e8e8e8;" | 61 || 3D || =
| style="background:#e8e8e8;" | 93 || 5D || ]
| style="background:#e8e8e8;" | 125 || 7D || }
|-align=center
| style="background:#e8e8e8;" | 30 || 1E
| style="text-align:left;" | Record Separator
| style="background:#e8e8e8;" | 62 || 3E || >
| style="background:#e8e8e8;" | 94 || 5E || ^
| style="background:#e8e8e8;" | 126 || 7E || ~
|-align=center
| style="background:#e8e8e8;" | 31 || 1F
| style="text-align:left;" | Unit Separator
| style="background:#e8e8e8;" | 63 || 3F || ?
| style="background:#e8e8e8;" | 95 || 5F || _
| style="background:#e8e8e8;" | 127 || 7F || Delete
|}
