The C0 and C1
control code sets define control codes for use in text. C0, originally defined in
ISO 646, defines codes in the range 00
HEX–1FHEX. C1, originally defined in
ISO 6429, defines codes in the range 80HEX–9FHEX. The C0 codes are contained in
ASCII and most encodings based on it. The C1 codes were included in the
ISO-8859-n series of encodings and
Unicode but are rarely used. When they turn up in documents, Web pages, e-mail messages, etc., which are ostensibly in an ISO-8859-n encoding, their code positions were reused to refer to the characters at that position in a proprietary, system-specific encoding such as
Windows-1252 or the
Apple Macintosh ("
MacRoman") character set.
See more at Wikipedia.org...
A
transmission control character used as a request for a
response from the station with which a
connection has been set up. Note: The response may include station identification, the type of equipment in service, and the status of the remote station.
1. <
character> /enkw/ or /enk/ ENQuire. The
mnemonic for
ASCII character 5.
2. An on-line convention for querying someone's availability. After opening a
chat connection to someone apparently in heavy hack mode, one might type "SYN SYN ENQ?" (the SYNs representing notional synchronisation bytes), and expect a return of
ACK or
NAK depending on whether or not the person felt interruptible.
Compare
ping,
finger.
[
Jargon File]
(1998-01-18)
ENQUIRY. ENQ
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