Keyboard Layout
This section describes the mode switches, data entry keys, and operating keys provided on your calculator. The
following terms are used in discussing your calculator’s operation:
¾ The accumulator is the area of the calculator’s logic that stores a running total of the results of addition
and subtraction operations. It is the “adding machine” portion of the calculator.
¾ The calculating register is the area of the calculator’s logic where the intermediate and final results of
multiplication, division, and percentage calculations are stored. The contents of the calculating register do
not affect the accumulator.
¾ The keyboard register is the area of the calculator’s logic that stores the value that will immediately be
used in the next calculation.
¾ The item count register is the area of the calculator’s logic that counts your entries into the accumulator.
Each positive or negative entry is counted as one item.
¾ The memory register is the area of the calculator’s logic that accumulates amounts you add or subtract
from the memory. Because the memory register is independent of the accumulator and the calculating
register, it retains its value until you clear it with the Memory Total (MT) key.
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