I have been a frequent TI graphing calc. user for over 10 years, most commonly lately with the TI-89.
Then after hearing the HP crowd, I bought an HP-50 late 2006, which if you do choose to go HP you may choose over the HP-48.
I do use the RPN of the HP-50, but it takes much longer to get quick with it vs. the TI-89. I think even as a serious engineering calculator user, I'd recommend the TI-89. There are only a couple people out of hundreds of engineering students I know that use an HP48 or HP50 over the TI-89.
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I have been a frequent TI graphing calc. user for over 10 years, most commonly lately with the TI-89. Then after hearing the HP crowd, I bought an HP-50 late 2006, which if you do choose to go HP you may choose over the HP-48. I do use the RPN of the HP-50, but it takes much longer to get quick with it vs. the TI-89. I think even as a serious engineering calculator user, I'd recommend the TI-89. There are only a couple people out of hundreds of engineering students I know that use an HP48 or HP50 over the TI-89.
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