a. | 1. | Belonging to,or concerning, a focus; as, a focal point.
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Adj. | 1. | focal - having or localized centrally at a focus; "focal point"; "focal infection" |
2. | focal - of or relating to a focus; "focal length" |
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). |