HP 9s Scientific Calculator

After many years of relying on my HP graphing calculators (48SX), I had to scale down to a one-line calculator for use in one of my exams. HP sets the standard for engineering calculators. Unfortunately, the graphing calculators are a little too powerful for use in certain exams, since you can almost program them to do the work for you. My professor specified "1 line calculator ONLY" for the final exam. It's actually not that easy to find a good scientific calculator that's only 1-line. Most are 2-line, or graphing. For a 1-line calculator, especially for the price, this one is perfect. It's not as small as I had envisioned, but that's because of all the features/functions they have to accommodate. And if you're used to using a larger HP scientific calculator, you'll find this one fairly easy to get used to (despite the lack of RPN date entry mode, due to 1-line limitation).

Reverse Polish Notation (RPN) calulators use an <enter> key and do not have an <=>. Look closely at the image for this product: This calculator has an <enter> key and does not have a <=> key, but it's not RPN. The owners manual is useless (written in Spanish). I was so excited to get an affordable RPN calculator and I deflated like the Hindenburg when I figured out I got rooked. I guess I'm just bitter that I spilled coffee on my HP32 and I can't get a replacement for less than $75. Lucky for me there is an RPN calculator app for my Droid. Are you listening HP? Captive generations of RPN-users yearn for a basic $30 RPN calculator. Very Truly Yours.

I was hoping to get an old fashioned RPN calculator since it has the HP name. I was disappointed that it is just a TI calculator with different key names.

I bought this calculator as a replacement to an HP-30S calculator on whch I accidentally spilled soda pop. I didn't realize it was designed for users in Brazil. The manual was written in Portuguese. The only thing I don't like is that the "equal" key is labeled "Enter."

Very good..has good polar - rect conversion keys

Do not buy this! If you like RPN HP calculators, a pencil works better IMHO.

dim display

Good calculator, NOT RPN, that's what I was looking for. I knew the price was too good to be true. I just assumed with an enter button and no equal button it was. I was not deceived by the seller. Just didn't do my research.

I have to add a review here because the previous reviewer completely missed the point and is in fact mostly wrong. He/she is describing an RPN calculator which the 9s certainly is not! I do not know what calculator this person is refering to, but it is certainly not the HP 9s. I bought this one because I needed a simple scientific calculator with no bells and whistles. Well, that is what you get: it still has more functions than you would ever want to use and it is simple and straightforward to use. Furthermore, it is very cheap. What else do you want? Perhaps it is a bit plastick-y, but one cannot really complain for this price. Oh, and you do get a user manual in English (and lots of other languages), again, contrary what our previous reviewer said.

古いカシオのfx560から買い替えました。左手で持ってキーを叩くときのホールド感の良さと、意匠性が気に入っています。計算におけるファンクションに不満はありません。ただ少し衝撃に弱いか？という気がします。仕事に没頭中は結構雑に扱ってしまうのですが、落っことした直後なんかは電源が入らなくなってしまうことがあります。しばらくたってから電源を入れれば普通に機能するのですが、たまにNGなときがあります。大切に扱えば問題ないのでしょうが・・・