| 摘要 |
A keyboard layout for a one-handed keypad having fifteen alphabetic keys (1-15). Each key has a primary letter and a secondary letter. The primary letter is keyed by solely striking the key, while the secondary letter requires striking a secondary key (16-19) first or simultaneously with the primary alphanumeric key (1-15). The layout (50) placement minimizes finger travel and keystrokes to generate the most common letters and digraphs in the English language.
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