Varicode
Varicode Oct Dec Hex Glyph
1011011111 140 96 60 `
1011 141 97 61 a
1011111 142 98 62 b
101111 143 99 63 c
101101 144 100 64 d
11 145 101 65 e
111101 146 102 66 f
1011011 147 103 67 g
101011 150 104 68 h
1101 151 105 69 i
111101011 152 106 6A j
10111111 153 107 6B k
11011 154 108 6C l
111011 155 109 6D m
1111 156 110 6E n
111 157 111 6F o
111111 160 112 70 p
110111111 161 113 71 q
10101 162 114 72 r
10111 163 115 73 s
Varicode is a self-synchronizing code for use in PSK31. It supports all ASCII characters, but the characters used most frequently in English have shorter codes. The space between characters is indicated by a 00 sequence, an implementation of Fibonacci coding. Originally created for speeding up real-time keyboard-to-keyboard exchanges over low bandwidth links. Varicode is freely available.