Binary Oct Dec Hex Abbr1 CS2 CEC3 Description
000 0000 000 0 00 NUL ^@ \0 Null character
000 0001 001 1 01 SOH ^A Start of Header
000 0010 002 2 02 STX ^B Start of Text
000 0011 003 3 03 ETX ^C End of Text
000 0100 004 4 04 EOT ^D End of Transmission
000 0101 005 5 05 ENQ ^E Enquiry
000 0110 006 6 06 ACK ^F Acknowledgment
000 0111 007 7 07 BEL ^G \a Bell
000 1000 010 8 08 BS ^H \b Backspace4 5
000 1001 011 9 09 HT ^I \t Horizontal Tab
000 1010 012 10 0A LF ^J \n Line feed
000 1011 013 11 0B VT ^K \v Vertical Tab
000 1100 014 12 0C FF ^L \f Form feed
000 1101 015 13 0D CR ^M \r Carriage return6
000 1110 016 14 0E SO ^N Shift Out
000 1111 017 15 0F SI ^O Shift In
001 0000 020 16 10 DLE ^P Data Link Escape
001 0001 021 17 11 DC1 ^Q Device Control 1 (aka XON)
001 0010 022 18 12 DC2 ^R Device Control 2
001 0011 023 19 13 DC3 ^S Device Control 3 (aka XOFF)
001 0100 024 20 14 DC4 ^T Device Control 4
001 0101 025 21 15 NAK ^U Negative Acknowledgement
001 0110 026 22 16 SYN ^V Synchronous Idle
001 0111 027 23 17 ETB ^W End of Trans. Block
001 1000 030 24 18 CAN ^X Cancel
001 1001 031 25 19 EM ^Y End of Medium
001 1010 032 26 1A SUB ^Z Substitute
001 1011 033 27 1B ESC ^[ \e7 Escape8
001 1100 034 28 1C FS ^\ File Separator
001 1101 035 29 1D GS ^] Group Separator
001 1110 036 30 1E RS ^^ Record Separator
001 1111 037 31 1F US ^_ Unit Separator
111 1111 177 127 7F DEL ^? Delete9 5
Binary Oct Dec Hex Glyph
010 0000 040 32 20  
010 0001 041 33 21 !
010 0010 042 34 22 "
010 0011 043 35 23 #
010 0100 044 36 24 $
010 0101 045 37 25 %
010 0110 046 38 26 &
010 0111 047 39 27 '
010 1000 050 40 28 (
010 1001 051 41 29 )
010 1010 052 42 2A *
010 1011 053 43 2B +
010 1100 054 44 2C ,
010 1101 055 45 2D -
010 1110 056 46 2E .
010 1111 057 47 2F /
011 0000 060 48 30 0
011 0001 061 49 31 1
011 0010 062 50 32 2
011 0011 063 51 33 3
011 0100 064 52 34 4
011 0101 065 53 35 5
011 0110 066 54 36 6
011 0111 067 55 37 7
011 1000 070 56 38 8
011 1001 071 57 39 9
011 1010 072 58 3A :
011 1011 073 59 3B ;
011 1100 074 60 3C <
011 1101 075 61 3D =
011 1110 076 62 3E >
011 1111 077 63 3F ?
Binary Oct Dec Hex Glyph
100 0000 100 64 40 @
100 0001 101 65 41 A
100 0010 102 66 42 B
100 0011 103 67 43 C
100 0100 104 68 44 D
100 0101 105 69 45 E
100 0110 106 70 46 F
100 0111 107 71 47 G
100 1000 110 72 48 H
100 1001 111 73 49 I
100 1010 112 74 4A J
100 1011 113 75 4B K
100 1100 114 76 4C L
100 1101 115 77 4D M
100 1110 116 78 4E N
100 1111 117 79 4F O
101 0000 120 80 50 P
101 0001 121 81 51 Q
101 0010 122 82 52 R
101 0011 123 83 53 S
101 0100 124 84 54 T
101 0101 125 85 55 U
101 0110 126 86 56 V
101 0111 127 87 57 W
101 1000 130 88 58 X
101 1001 131 89 59 Y
101 1010 132 90 5A Z
101 1011 133 91 5B [
101 1100 134 92 5C \
101 1101 135 93 5D ]
101 1110 136 94 5E ^
101 1111 137 95 5F _
Binary Oct Dec Hex Glyph
110 0000 140 96 60 `
110 0001 141 97 61 a
110 0010 142 98 62 b
110 0011 143 99 63 c
110 0100 144 100 64 d
110 0101 145 101 65 e
110 0110 146 102 66 f
110 0111 147 103 67 g
110 1000 150 104 68 h
110 1001 151 105 69 i
110 1010 152 106 6A j
110 1011 153 107 6B k
110 1100 154 108 6C l
110 1101 155 109 6D m
110 1110 156 110 6E n
110 1111 157 111 6F o
111 0000 160 112 70 p
111 0001 161 113 71 q
111 0010 162 114 72 r
111 0011 163 115 73 s
111 0100 164 116 74 t
111 0101 165 117 75 u
111 0110 166 118 76 v
111 0111 167 119 77 w
111 1000 170 120 78 x
111 1001 171 121 79 y
111 1010 172 122 7A z
111 1011 173 123 7B {
111 1100 174 124 7C |
111 1101 175 125 7D }
111 1110 176 126 7E ~
  1. ^ Printable Representation, the Unicode characters from the area U+2400 to U+2421 reserved for representing control characters when it is necessary to print or display them rather than have them perform their intended function. Some browsers may not display these properly. [The separate column of these has been sacrificed to keep the table-size reasonable, since they are unreadable, thus useless, unless rendered in an overlarge font.]
  2. ^ Control key Sequence/caret notation, the traditional key sequences for inputting control characters. The caret (^) that begins these sequences is not meant to signify the literal ^ character; rather, it represents the "Control" or "Ctrl" key that must be held down while pressing the second key in the sequence. Note that ^^ means Control-Caret (pressing the "Ctrl" and "^" keys), not Control-Control. The caret-key representation is also used by some software to represent control characters.
  3. ^ Character Escape Codes in C programming language and many other languages influenced by it, such as Java and Perl (though not all implementations necessarily support all escape codes). [One C-compiler I used circa 1974 used '\p' for ESC, '\e' for EOT; otherwise its escape codes were as shown.]
  4. ^ The Backspace character can also be entered by pressing the "Backspace", "Bksp", or ← key on most systems.
  5. ^ a b The ambiguity of Backspace comes from mismatches between the intent of the human or software transmitting the Backspace and the interpretation by the software receiving it. If the transmitter expects Backspace to erase the previous character and the receiver expects Delete to be used to erase the previous character, many receivers will echo the Backspace as "^H", just as they would echo any other uninterpreted control character. (A similar mismatch in the other direction may yield Delete displayed as "^?".)
  6. ^ The Carriage Return character can also be entered by pressing the "Return", "Ret", "Enter", or ↵ key on most systems.
  7. ^ The '\e' escape sequence is not part of ISO C and many other language specifications. However, it is understood by several compilers. [The C-compiler I used in my youth used '\p' for ESC; see note-3 above.]
  8. ^ The Escape character can also be entered by pressing the "Escape" or "Esc" key on some systems.
  9. ^ The Delete character can also be entered by pressing the "Delete" or "Del" key on most systems. However some systems, most notably the one Linus was used to when writing Linux, have the roles of the "Backspace" and "Delete" keys reversed; see note-5 above.


2009-09-24:
The table above is based on the separate Control- and Printable-characters tables in en.wikipedia.org/wiki/ASCII, however the historical notes are mine as are several minor revisions. 

I made this when my old green-card (IBM System/370 Reference Summary) after years of threatening to finally fell apart, at which time it also dawned on me that its tiny print had been shrinking to the point of illegibility, that for years the only part I'd been using was the ASCII info (as opposed to the EBCDIC, 370-machine-language, and Hollerith-punched-card info), and that by eliminating the unwanted columns, I'd be able to add an Octal column and still end up with something that would fit in its entirety onto a modern monitor and be readable.  This page is best viewed in a window at least 1200-pixels wide.  Larger window will be needed if your default fontsize is large.