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This is a well thought-out calculator. It uses the popular algebraic entry system, not RPN(RPN is great, but not mainstream). The HP 39G was intended to compete with the TI-83 line, but it easily trumps the TI-84 series. The screen is easy to read and the fonts are much nicer than the easy-to-read but grainy TI-83/-84 line, and it is able to put more characters on the screen with its higher pixel density. The menu system looks very professional with lots of panache. Negatives - The default setting for the keyboard "debounce' timer does not allow you to quickly enter numbers, so you'll want to download one of the free utilities that allows you to change the "keytime" value. It makes a big difference. The keys are reliable but mushy feeling compared to an HP 50g or even a TI-83/-84. The calculator is relatively slow in running programs and graphing. There are a few functions that I would like to have seen as built-in, such as base conversions, but most low and mid-range graphers of any brand do not have this. The free downloadable L1540 math library adds this capability and a lot of additional functionality, but since it is an afterthought, the functions don't interact seamlessly with the rest of the calculator as you might like. I purchased my HP 39G on ebay for $32 + shipping and I feel like the calculator is worth quite a bit more. You get a lot of calculator for the money. If you decide to get a 39G, you'll want to also purchase the cable so you can download additional utilities and libraries, as mentioned above. I bought my cable very inexpensively from SamsonCables.com. - Jeff -Read full review
Reviews on 40 or 50 year old items confuse me. I have a preference to high quality, HP calculators, but they must, for me, have RPN keystroke notation, all RPN units I have seen are programable as well. This current one, I actually brought a total of three, $20 to $40 this week, two for neices. These were made in about 1999. Quality and conistancy has been great all along. Even since 1999, there has upgrades... In the '70's and '80's, HP RPN units sold for $200 to $500, or more... For those who asked me to write this review, and rejected it... Up to you... Thanks... John +
The calculator works very well, graphing functions and solving all kinds of equations, useful for all standardized tests
Verified purchase: Yes | Condition: Pre-owned
Good and honest description of the product
Verified purchase: Yes | Condition: Pre-owned
works great
Verified purchase: Yes | Condition: Pre-owned