| base 10 | base 16 | base 02 | symbol | description |
|---|---|---|---|---|
| 0 | 00 | 0000 0000 | NUL | Null character |
| 1 | 01 | 0000 0001 | SOH | Start of Heading |
| 2 | 02 | 0000 0010 | STX | Start of Text |
| 3 | 03 | 0000 0011 | ETX | End of Text |
| 4 | 04 | 0000 0100 | EOT | End of Transmission |
| 5 | 05 | 0000 0101 | ENQ | Enquiry |
| 6 | 06 | 0000 0110 | ACK | Acknowledge |
| 7 | 07 | 0000 0111 | BEL | Bell, Alert |
| 8 | 08 | 0000 1000 | BS | Backspace |
| 11 | 0B | 0000 1011 | VT | Vertical Tabulation |
| 12 | 0C | 0000 1100 | FF | Form Feed |
| 14 | 0E | 0000 1110 | SO | Shift Out |
| 15 | 0F | 0000 1111 | SI | Shift In |
| 16 | 10 | 0001 0000 | DLE | Data Link Escape |
| 17 | 11 | 0001 0001 | DC1 | Device Control One (XON) |
| 18 | 12 | 0001 0010 | DC2 | Device Control Two |
| 19 | 13 | 0001 0011 | DC3 | Device Control Three (XOFF) |
| 20 | 14 | 0001 0100 | DC4 | Device Control Four |
| 21 | 15 | 0001 0101 | NAK | Negative Acknowledge |
| 22 | 16 | 0001 0110 | SYN | Synchronous Idle |
| 23 | 17 | 0001 0111 | ETB | End of Transmission Block |
| 24 | 18 | 0001 1000 | CAN | Cancel |
| 25 | 19 | 0001 1001 | EM | End of medium |
| 26 | 1A | 0001 1010 | SUB | Substitute |
| 27 | 1B | 0001 1011 | ESC | Escape |
| 28 | 1C | 0001 1100 | FS | File Separator |
| 29 | 1D | 0001 1101 | GS | Group Separator |
| 30 | 1E | 0001 1110 | RS | Record Separator |
| 31 | 1F | 0001 1111 | US | Unit Separator |
Not all of these are tested.
[\u0000-\u0008\u000C\u000E-\u0019][#x00-#x08#x0C#x0E-#x19][^[:print:]] ; where ‘’ is typed CTL-J[^[:print:]]