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Review title: The best non-RPN calculator
Product review: I purchased my HP 20S about six years ago and have had no problems. The best features are the keys, key layout and physical durability. The keys are a hard plastic and have an angled profile which makes the calculator easy to use when wearing protective gloves. The key layout is very useful for quick statistical entry and calculations. The durability of this calculator is amazing. It has been through more than I would like to admit, and still functions perfectly. I prefer algebraic entry over RPN and would recommend this calculator to anyone considering a top-notch non-RPN scientific calculator for heavy laboratory use.
