Worth the money
I had been using the clone of this calculator, available here also, for quite some time. It was very good but it isnt this calculator. This one is the real thing. Vertical it is a normal calculator with a tip function that you will hardly if ever use. Turn horizontal it is the HP 12C. A familiar and useful friend. Touch the hp logo and it flips for an instant cheat sheet. Press menu and an abbreviated manual is available. I found it hard to read the key sequences but it is enough.
Simply: There is no substitute. Buy this one.
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HP 12C Platinum Calculator