I have an HP 28s again.

I have an HP 28s again. The HP 28s was the only RPN calculator I enjoyed using. I bought one in 1988 and it saw me through high school and an engineering degree. Its great to have one back in my hand. I considered rating the app 4 stars because of some UI nags, but given the apps price, its faithfulness to the original calculator, and its expandability, I have to give it 5 stars.

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