FOCAL

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FOCAL

1. FOrmula CALculator.

An interactive system written by Rick Merrill of DEC in 1969 for PDP-5 and PDP-8. It was a descendant of AID/JOSS.

Versions: FOCAL-69, FOCAL-1971, FOCAL-11 (for PDP-11 under RT-11).
References in periodicals archive ?
HE staining indicated that the focal zone was deeply stained in the corneal stroma in the treated group 1 day after operation.
and Michalek, J.: 2008, Post 2000-swarm microearthquake activity in the principal focal zone of West Bohemia/Vogtland: space-time distribution and waveform similarity analysis.
Our intention was to investigate the effects of HFJV during SWL using a newer generation lithotripter with a smaller focal zone.
It does not improve lateral resolution in the near field or in the focal zone because it depends on the width of the beam.
"In a focal zone, this number could increase to about three in every 1,000 waves," Dr.
The electrohydraulic Ossatron has a larger focal zone (the area where the pressure is the greatest).
Focal Zone or Focal Point: One or more areas of greatest visual impact or weight; one or more centers of interest to which the eye is drawn to most naturally.
Since the nearfield focal zone is large (in particular, the focal zone s depth of field is quite large), useful testing at high field strengths can be performed on a wide range of devices.