| 摘要 |
A calculator instruction key is provided which preconditions the calculator to transfer information to a display register from an address in memory to be specified by subsequent key strokes. The above-mentioned calculator instruction key generates a key code identical to a second calculator instruction key which also preconditions the calculator to compute a hyperbolic trigonometric function. The function performed by the calculator is determined by the kind of key depressed following the instruction key, an alpha-numeric key initiating the memory transfer operation or a trigonometric key initiating the computation of a hyperbolic trigonometric function.
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