I have been a loyal HP fan since the 1970's and have owned numerous great HP machines (both RPN and algebraic and also combined units). This machine however is a total waste of time because its keyboard is totally disfunctional. The rubber keys (NOT plastic) are way too hard to press in my opinion and generate only much anger and disgust. I don't need such heartache just to do calculations on a nicely portable, hand held device (which this machine definitely is!) no matter how sophisticated it may be and with this machine's extensive software they can be extremely sophisticated. Don't waste your time with this machine however.

I tried to make do (given what else was available at the time) and used it for over a year before giving up on it entirely and I am very sorry that I did. For the money spent right now at $ 111.00 on Amazon, the HP50g is a far far better value and it actually works the way a calculator is supposed to work. The actual software differences between the two machines are only minor. The HP49g is really a beautiful machine, but given its severe key problems, in this case that beauty is only skin deep (as they say)!
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