One millionth of the fundamental unit of time in the
Furlong/Firkin/Fortnight system of measurement; 1.2096 sec.
(A furlong is 1/8th of a mile; a firkin is 1/4th of a barrel;
the mass unit of the system is taken to be a firkin of water).
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 realises that
the current value is bogus. This time is specified in
microfortnights!
Multiple uses of the millifortnight (about 20 minutes) and