A - 4
to U.S. style keyboards.  Certain characters may differ depending on your Country Code/PC regional settings. 
Lower ASCII Reference Table
Note: Windows Code page 1252 and lower ASCII use the same characters. 
Non-printable            ASCII control 
characters
Keyboard Control + ASCII (CTRL+X) Mode 
Control + X Mode Off (KBDCAS0)
Windows Mode Control + X Mode On (KBDCAS2)
DEC HEX Char CTRL + X CTRL + X function
0 00 NUL Reserved CTRL+ @  
1 01 SOH NP Enter CTRL+ A Select all
2 02 STX Caps Lock CTRL+ B Bold
3 03 ETX ALT Make CTRL+ C Copy
4 04 EOT ALT Break CTRL+ D Bookmark
5 05 ENQ CTRL Make CTRL+ E Center
6 06 ACK CTRL Break CTRL+ F Find
7 07 BEL Enter / Ret CTRL+ G  
8 08 BS (Apple Make) CTRL+ H History
9 09 HT Tab CTRL+ I Italic
10 0A LF (Apple Break) CTRL+ J Justify
11 0B VT Tab CTRL+ K hyperlink
12 0C FF Delete CTRL+ L
list, 
left align
13 0D CR Enter / Ret CTRL+ M  
14 0E SO Insert CTRL+ N New
15 0F SI ESC CTRL+ O Open
16 10 DLE F11 CTRL+ P Print
17 11 DC1 Home CTRL+ Q Quit
18 12 DC2 PrtScn CTRL+ R  
19 13 DC3 Backspace CTRL+ S Save
20 14 DC4 Back Tab CTRL+ T  
21 15 NAK F12 CTRL+ U  
22 16 SYN F1 CTRL+ V Paste 
23 17 ETB F2 CTRL+ W  
24 18 CAN F3 CTRL+ X  
25 19 EM F4 CTRL+ Y
 
26 1A SUB F5 CTRL+ Z
 
27 1B ESC F6 CTRL+ [
 
28 1C FS F7 CTRL+ \
 
29 1D GS F8 CTRL+ ]
 
30 1E RS F9 CTRL+ ^
 
31 1F US F10 CTRL+ -
 
127 7F
⌂
NP Enter
 
Printable Characters
DEC HEX Character DEC HEX Character DEC HEX Character 
32 20 <SPACE> 64 40 @ 96 60 `
33 21 ! 65 41 A 97 61 a
34 22 " 66 42 B 98 62 b
35 23 # 67 43 C 99 63 c