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Alvaro, It all depends on your intended use. I own both HP 50 G and Prime as well as others, 48GX, 42S, 35S, 15S, etc. Do you need the graphing capabilities? Are you going to write lots of programs (RPL vs HPPL)? I prefer the keyboard of Prime over 50 G, and for simple calculator like tasks, 35S works well. I have created some custom apps for the Prime to solve typical engineering problems I encounter every day. I would recommend you go here for more help: http://www.hpmuseum.org/forum/
Sorry, there was a problem. Please try again later.NO! This is NOT an engineer’s calculator. This abomination doesn’t know if it’s a pda or a calc: (1) On a calc, the interface is with keys. Putting fingers on the screen is confusing (2) The key color scheme is hard to read (3) The split between numerics and CAS is confusing, makes the machine essentially unusable (4) Rechargeble battery life unknown. For regular calcs, extra batteries on hand and zip, it’s done. (5) Gone are HP standbys such as expandable memory and assignable keys. To sum up, use any other HP (48, 49, 50) than this awful machine. Indeed, a TI89 is more useable than the crime called the Prime.
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