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E–1
Appendix E
STANDARDS
ASCII Control Characters
Oct
Dec. Hex Character Key Description
000 0 0x00 NUL CTRL-@ NUL character
001 1 0x01 SOH CTRL-A Header start
002 2 0x02 STX CTRL-B Text start
003 3 0x03 ETX CTRL-C Text end
004 4 0x04 EOT CTRL-D End of transmission
005 5 0x05 ENQ CTRL-E Enquiry
006 6 0x06 ACK CTRL-F Positive Acknowledgement
007 7 0x07 BEL CTRL-G Bell
010 8 0x08 BS CTRL-H Backspace
011 9 0x09 HT CTRL-I Horizontal TAB
012 10 0x0A LF CTRL-J Line feed
013 11 0x0B VT CTRL-K Vertical TAB
014 12 0x0C FF CTRL-L Form feed
015 13 0x0D CR CTRL-M Carriage Return
016 14 0x0E SO CTRL-N Shift Out
017 15 0x0F SI CTRL-O Shift In
020 16 0x10 DLE CTRL-P Data Link Escape
021 17 0x11 DC1 CTRL-Q Device control 1 (XON)
022 18 0x12 DC2 CTRL-R Device control 2
(start tape)
023 19 0x13 DC3 CTRL-S Device control 3 (XOFF)
024 20 0x14 DC4 CTRL-T Device control 4
(stop tape)
025 21 0x15 NAK CTRL-U Negative Acknowledge
026 22 0x16 SYN CTRL-V Synchronization