n. 1/1000000 of the fundamental unit of time in
the Furlong/Firkin/Fortnight system of measurement; 1.2096 sec.
The VMS operating system has a lot of tuning parameters that you
can set with the SYSGEN utility, and one of these is
TIMEPROMPTWAIT, the time the system will wait for an operator to
set the correct date and time at boot if it realizes that the
current value is bogus. This time is specified in microfortnights!
Multiple uses of the millifortnight (about 20 minutes) and
have also been reported.