Human Factors Criteria for the Design and Acquisition of ... - FAA
Human Factors Criteria for the Design and Acquisition of ... - FAA
Human Factors Criteria for the Design and Acquisition of ... - FAA
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Keyboards June 20049.7 NumerickeypadDescription. Numeric keypads are a separate grouping <strong>of</strong>numbered keys from 1 to 9, generally arranged in 3 X 3 array,with zero on a separate bottom row. They are intended <strong>for</strong>high volumes <strong>of</strong> numeric input.Exhibit 9.7 Numeric keypadsCalculator (ADD)LayoutTelephone (TEL)Layout7 8 91 2 34 5 64 5 61237 8 900• 9.7.1 Include a numeric keypad <strong>for</strong> entering numericdata. If an application requires substantial <strong>and</strong> repetitiveinput <strong>of</strong> numeric data, a numeric keypad shall be provided.[Source: Card, et al., 1978; MIL-STD-1472F, 1999]9.7.2 Separate numeric keypad. When numeric entry isinfrequent <strong>and</strong> <strong>the</strong> keyboard is used toge<strong>the</strong>r with o<strong>the</strong>rinput devices, <strong>the</strong> numeric keypad should be separate from<strong>the</strong> keyboard. [Source: Ilg, 1987; Morelli, Johnson, Reddell & Lau,1995]9-22
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