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1 definition for JFCL From The Free On-line Dictionary of Computing (27 SEP 03) :
JFCL
/jif'kl/, /jaf'kl/, /j*-fi'kl/ (obsolete) To cancel or annul
something. "Why don't you jfcl that out?" The fastest
do-nothing instruction on older models of the PDP-10
happened to be JFCL, which stands for "Jump if Flag set and
then CLear the flag"; this does something useful, but is a
very fast no-operation if no flag is specified. Geoff
Goodfellow, one of the jargon-1 co-authors, had JFCL on the
licence plate of his BMW for years. Usage: rare except among
old-time PDP-10 hackers.
[{Jargon File]
(1994-11-22)
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