Got quite a collection myself Chris. Everytime the curriculum changes so do the calculators so I have to get a new one each time as well as the inevitable evolutions along the way. Not a big fan of HP calculators although I have owned and do own a few. I used to have one with RPN which was a bit of a pain but was fully programmable if you knew HP speak. My all time favourite would be the sharp EL-548G. Even though it only had a single line display I somehow became one with that calculator and always knew where I was (memorised the menu's). Geek, hell yes
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Mark