A quick interlude before we get back at it. Its probably time to replace my 42 - it's so old I think I have changed the batteries four times. I suspect everything I use is on all the models, so convenient access to natural logs, e^x, complex math, complex matricies, at least a couple of display lines ,polar-rectanguar conversion, D.M.S-decimal degrees-radians conversion, trig, hyperbolic trig. Never had much use for graphing, programming, statistical, finacialmivey said:... I really like my 41CX, 48SX, 49G, 20S
So what would you recommend I get - yes, it will be an RPN.
carl