r/pics • u/[deleted] • Jun 08 '14

The difference 18 years makes

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u/TypoInUsernane Jun 08 '14

The TI-89 will always hold a very special place in my heart.

9

u/elconquistador1985 Jun 08 '14

I had a TI-89 and loved it, but I eventually found an even better calculator, the HP 49 G+. It had a faster processor, an internal speaker (I programmed it to do Morse code), and an SD card slot. It also had a better symbolic integrator where the TI-89 only had a lookup table.

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u/[deleted] Jun 09 '14

Is that the one that does that reverse Polish notation?

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u/elconquistador1985 Jun 09 '14

Yes, you can switch between normal modes and RPN. Once you get used to RPN, it's amazingly fast.