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HP 20b keys, which many found to be inadequate. While the author never had any real problems with the HP 20b keys, it certainly is nice to have a good click when pressing a key. Secondly, the HP 30b comes with a metallic-looking faceplate compared to the shiny black faceplate on the HP 20b.
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MIRR and FMRR. The HP 30b extends the usefulness of the HP 20b’s cash flow analysis tools by including Modified Internal Rate of Return and, for the first time ever in a financial calculator, the Financial Management Rate of Return.
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Math menu and assigned to keys. This is a great time saver. Short programs have also been written for things such as a prime factor finder, a translation of the HP 25 lunar Lander game, base conversions for bases 2-10 and more.
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0. This allows for the use of a rather large data set and has already been used to compute and store nearly 700 digits of PI on the HP 30b as shown in the Programming Examples learning module.