Radio Shack TRS-80 PC-3 Owner's Manual page 16

CA
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Figure 3.
Use this power slide switch to turn the PC-3 ON and OFF. Notice that the machine is ON when this switch is positioned
- in anyone of three modes: RUN, PROgram, and ReSerVe.
Clear key. Pressing Clear erases the characters you have just typed ir. and "releases" errors. Pressing
pressing this key activates the CA (reset) function. CA clears the display and resets the computer.
ON
RSV
PRO
RUN
OFF
OO~w8
CA
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Number keys. The layout of these keys is similar to that found on the standard calculator.
14
(SHIFT)
before