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 ?
2008, Post 2000-swarm microearthquake activity in the principal focal zone of West Bohemia/Vogtland: space-time distribution and waveform similarity analysis.
The ultrasound beam is narrower in the focal zone along both the long and short axes.
Our intention was to investigate the effects of HFJV during SWL using a newer generation lithotripter with a smaller focal zone.
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.
HIFU focuses sound waves in a targeted area, which rapidly increases the temperature in the focal zone, causing tissue destruction.
3 Return to the bus focal zone initiative with bus stops in Broadgate, Trinity Street, Cross Cheaping, the bottom of Hertford Street, Lidice Place and Corporation Street.
Concern among local residents over the construction of the new reactor will grow, however, as the Hamaoka station is located in the center of the focal zone of a big earthquake that is expected to hit central Japan's Tokai region centering on Nagoya.