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RPN calculator prototypes
A DIY1 and two DIY2 calculators. The DIY1 uses a modified off-the-shelf case with a laminated photo paper overlay. The DIY2 us
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RPN calculator prototypes
1. A DIY1 and ...
2. A DIY1 and ...
3. DIY3 in...
A DIY1 and two DIY2 calculators. The DIY1 uses a modified off-the-shelf case with a laminated photo paper overlay. The DIY2 us
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