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The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. [6] [7] [8] The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; [9] the pattern of the position detection markers was determined by finding the least-used sequence of ...
The Forward Air Controller (FAC) fulfilled many duties during the Second Indochina War.In addition to the usual close air support strike missions to aid South Vietnamese ground forces in their struggle against insurgents backed by the Democratic Republic of Vietnam, he might direct combat search and rescue operations or air interdiction strikes on the Ho Chi Minh Trail.