optools/ref/ascii/tables/ctrl.adoc

| 0
| 000
| 00
| 00000000
| �
| N/A
| _NUL_
| Null byte/character

| 1
| 001
| 01
| 00000001
| 
| N/A
| _SOH_
| Start of heading

| 2
| 002
| 02
| 00000010
| 
| N/A
| _STX_
| Start of text

| 3
| 003
| 03
| 00000011
| 
| N/A
| _ETX_
| End text

| 4
| 004
| 04
| 00000100
| 
| N/A
| _EOT_
| End of transmission

| 5
| 005
| 05
| 00000101
| 
| N/A
| _ENQ_
| Enquiry

| 6
| 006
| 06
| 00000110
| 
| N/A
| _ACK_
| Acknowledgement

| 7
| 007
| 07
| 00000111
| 
| N/A
| _BEL_
| Terminal bell

| 8
| 010
| 08
| 00001000
| 
| N/A
| _BS_
| Backspace

| 9
| 011
| 09
| 00001001
| 	
| N/A
| _HT_
| Horizontal tab (`\t`)

| 10
| 012
| 0a
| 00001010
| 

| N/A
| _LF_
| Line feed (`\n`)

| 11
| 013
| 0b
| 00001011
| 
| N/A
| _VT_
| Vertical tab

| 12
| 014
| 0c
| 00001100
| 
| N/A
| _FF_
| Form feed

| 13
| 015
| 0d
| 00001101
| 
| N/A
| _CR_
| Carriage return (`\r`)

| 14
| 016
| 0e
| 00001110
| 
| N/A
| _SO_
| Shift out (`X-ON`)

| 15
| 017
| 0f
| 00001111
| 
| N/A
| _SI_
| Shift in (`X-OFF`)

| 16
| 020
| 10
| 00010000
| 
| N/A
| _DLE_
| Data line escape

| 17
| 021
| 11
| 00010001
| 
| N/A
| _DC1_
| Device control 1 (`XON`)

| 18
| 022
| 12
| 00010010
| 
| N/A
| _DC2_
| Device control 2

| 19
| 023
| 13
| 00010011
| 
| N/A
| _DC3_
| Device control 3 (`XOFF`)

| 20
| 024
| 14
| 00010100
| 
| N/A
| _DC4_
| Device control 4

| 21
| 025
| 15
| 00010101
| 
| N/A
| _NAK_
| Negative acknowledgement

| 22
| 026
| 16
| 00010110
| 
| N/A
| _SYN_
| Synchronous idle

| 23
| 027
| 17
| 00010111
| 
| N/A
| _ETB_
| End transmit block

| 24
| 030
| 18
| 00011000
| 
| N/A
| _CAN_
| Cancel

| 25
| 031
| 19
| 00011001
| 
| N/A
| _EM_
| End medium

| 26
| 032
| 1a
| 00011010
| 
| N/A
| _SUB_
| Substitute

| 27
| 033
| 1b
| 00011011
| 
| N/A
| _ESC_
| Escape

| 28
| 034
| 1c
| 00011100
| 
| N/A
| _FS_
| File separator

| 29
| 035
| 1d
| 00011101
| 
| N/A
| _GS_
| Group separator

| 30
| 036
| 1e
| 00011110
| 
| N/A
| _RS_
| Record Separator

| 31
| 037
| 1f
| 00011111
| 
| N/A
| _US_
| Unit Separator