| General > General Technical Chat |
| What calculator do you use ? |
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| baljemmett:
--- Quote from: Noize on April 18, 2012, 11:29:20 pm ---Well thanks to this thread I'm getting a Casio CFX-9850G off ebay in a few days for use on that MIT 6.002x course. :) For the price of a pint of beer NIce. ;D --- End quote --- Oh, don't say that, I remember paying a hundred-plus quid for mine shortly after it first came out -- would've been towards the end of my days at secondary school, and working my way through my maths teacher's engineering maths textbook. Needed to replace my fx-7000GB (which had suffered an indignity and ended up with a smashed screen) and figured "hey, shiny, colour screen and significantly more modern, what's not to like?" Nice enough machine, the colour display is probably about the best you can expect given the technology of the time, and some of the features are rather nice -- graphically solving inequalities makes good use of the colour, for instance -- but I do sometimes have to spend a moment working out where in the menus a given option is hiding, compared to the rather upfront nature of its simpler brethren! (Mind you, in more recent years I've picked up a replacement fx-7000GB and an fx-6300G, which I'd used before the 7000, both for very little; the 7000 lives on my desk at work whereas the 6300 hangs around the living room at home. The latter has been what I've been using for 6.002x; I was quite pleased to discover I could still remember how to use the graphics functions to read off values at an intersection, more than fifteen years after I last used that model in anger!) |
| ee851:
I use KCalc on my computer (part of the KDE desktop). KCalc does binary, hex, octal, as well as decimal. And I still use my HP15C, which I have had for twelve years. Got it second-hand. Still works great. I'd like to know if the ones for sale online are part of the original HP models, or if they're cheap Chinese copies. I'd buy another HP15C immediately if I knew it were made by HP. I have also owned an HP41CX, which is a programmable calcu lator. RPN is great for hand calculations, I agree. But it's hard to read the programs when you write programs in it. What I mean is, to debug and to remember the HP41CX programs, I had to draw myself little schematics in order to remember what result was in which register before and after each step of the program and in which memories I had stored which intermediate results! Even with only a couple of registers, programs written for this machine were nowhere as easy to read as those written in a symbolic language, like Matlab, for example. I guess I might feel differently if I were an assembler programmer. But I am not. |
| ee851:
Before reading this thread, I'd never heard of VPAM "Visually Perfect Algebraic Method". Does anybody know what is the difference between this and AOS "Algebraic operating system"? Or is it just the same thing called X by manufacturer A and Y by manufacturer B? |
| slateraptor:
--- Quote from: ee851 on April 19, 2012, 04:04:19 pm ---I'd like to know if the ones for sale online are part of the original HP models, or if they're cheap Chinese copies. I'd buy another HP15C immediately if I knew it were made by HP. --- End quote --- The latest 15c Limited are manu. by Kinpo for HP. Battery life isn't as hot, the f'n buttons rattle, no reference on the back side, and diagnostics is different, but other than that, they're fair and worth the purchase imo. If you can pick up a good condition original for a comparable price (fat chance), I'd go for that over the new Limited. |
| qno:
I have a Casio fx-3600P. It is running on it second battery. I bought it new around 1980. Still works perfect. |
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