By A Mystery Man Writer
The best programmable calculator. From Hewlett-Packard, served with UPN (RPN). • Millions of unique designs by independent artists. Find your thing.
Building The DIY HP41C: A Field Report
HP-41 - The Ultimate Calculator – Geir's Everything
A 41 without a 41 – Jamel Tayeb
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HP-41C/CV/CX
HP Computer Museum
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ZENROM: The HP-41 Programmers Module - HP Calculator Literature
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