Special Characteres DEC 01 until Dec 31 and the DEC 127. In the following link you can see these characteres
http://en.wikipedia.org/wiki/ASCII
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Binary --- Oct ----- Dec ----- Hex ----- Abbr ----- [t 1] ----- [t 2] ----- [t 3] ----- Description
000 0000 --- 0 ---
0 --- 0 --- NUL ␀ ^@ \0 Null character
000 0001 --- 1 ---
1 --- 1 --- SOH ␁ ^A Start of Header
000 0010 --- 2 ---
2 --- 2 --- STX ␂ ^B Start of Text
000 0011 --- 3 ---
3 --- 3 --- ETX ␃ ^C End of Text
000 0100 --- 4 ---
4 --- 4 --- EOT ␄ ^D End of Transmission
000 0101 --- 5 ---
5 --- 5 --- ENQ ␅ ^E Enquiry
000 0110 --- 6 ---
6 --- 6 --- ACK ␆ ^F Acknowledgment
000 0111 --- 7 ---
7 --- 7 --- BEL ␇ ^G \a Bell
000 1000 --- 10 ---
8 --- 8 --- BS ␈ ^H \b Backspace[t 4][t 5]
000 1001 --- 11 ---
9 --- 9 --- HT ␉ ^I \t Horizontal Tab[t 6]
000 1010 --- 12 ---
10 --- 0A --- LF ␊ ^J \n Line feed
000 1011 --- 13 ---
11 --- 0B --- VT ␋ ^K \v Vertical Tab
000 1100 --- 14 ---
12 --- 0C --- FF ␌ ^L \f Form feed
000 1101 --- 15 ---
13 --- 0D --- CR ␍ ^M \r Carriage return[t 7]
000 1110 --- 16 ---
14 --- 0E --- SO ␎ ^N Shift Out
000 1111 --- 17 ---
15 --- 0F --- SI ␏ ^O Shift In
001 0000 --- 20 ---
16 --- 10 --- DLE ␐ ^P Data Link Escape
001 0001 --- 21 ---
17 --- 11 --- DC1 ␑ ^Q Device Control 1 (oft. XON)
001 0010 --- 22 ---
18 --- 12 --- DC2 ␒ ^R Device Control 2
001 0011 --- 23 ---
19 --- 13 --- DC3 ␓ ^S Device Control 3 (oft. XOFF)
001 0100 --- 24 ---
20 --- 14 --- DC4 ␔ ^T Device Control 4
001 0101 --- 25 ---
21 --- 15 --- NAK ␕ ^U Negative Acknowledgement
001 0110 --- 26 ---
22 --- 16 --- SYN ␖ ^V Synchronous Idle
001 0111 --- 27 ---
23 --- 17 --- ETB ␗ ^W End of Transmission Block
001 1000 --- 30 ---
24 --- 18 --- CAN ␘ ^X Cancel
001 1001 --- 31 ---
25 --- 19 --- EM ␙ ^Y End of Medium
001 1010 --- 32 ---
26 --- 1A --- SUB ␚ ^Z Substitute
001 1011 --- 33 ---
27 --- 1B --- ESC ␛ ^[ \e[t 8] Escape[t 9]
001 1100 --- 34 ---
28 --- 1C --- FS ␜ ^\ File Separator
001 1101 --- 35 ---
29 --- 1D --- GS ␝ ^] Group Separator
001 1110 --- 36 ---
30 --- 1E --- RS ␞ ^^[t 10] Record Separator
001 1111 --- 37 ---
31 --- 1F --- US ␟ ^_ Unit Separator
111 1111 --- 177 ---
127 --- 7F --- DEL ␡ ^? Delete[t 11][t 5]