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Ensure that the HP-41C is not in PRGM mode. Then execute SQR by scanning the following bar code:
Bar Code
SQR
XEQ
Scan the square in the upper left corner
of the following illustration.
To scan another square and view its
position, reexecute SQR.
HP 82153A - Wand Owner Manual - page 15
Display
W: READY
ROW 1, COL 1
Identifies the row and column of the square you scanned.
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