AmericAn StAndArd code for informAtion interchAnge
ASCII ValueSymbolDescription
000(NUL)Null char
001
(SOH)
Start of Heading
002
(STX)
Start of Text
003
(ETX)
End of Text
004
(EOT)
End of Transmission
005
(ENQ)
Enquiry
006
(ACK)
Acknowledgment
007• (BEL)Bell
008
(BS)
Back Space
009
(HT)
Horizontal Tab
010
(LF)
Line Feed
011
(VT)
Vertical Tab
012
(FF)
Form Feed
013
(CR)Carriage Return
014
(SO)
Shift Out / X-On
015
(SI)
Shift In / X-Off
016
(DLE)
Data Line Escape
017
(DC1)
Device Control 1 (often XON)
018
(DC2)
Device Control 2
019
(DC3)
Device Control 3 (often XOFF)
020
(DC4)
Device Control 4
021
(NAK)
Negative Acknowledgement
022
(SYN)
Synchronous Idle
023
(ETB)
End of Transmit Block ...
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