50g

I'm into electronics myself as a hobby.  I think when they talk about precision with this calculator, their talking about some crazy scientific accuracy on an atomic scale.  I'd just stick it in approxamate mode and complex mode and leave it.  If you go through the CAS functions you'll see that you have more options in those modes.  I never got how to do the for, while, and looping programs.  That's what I'm working on right now.  I have some basic stuff in my files section as well as a bunch of stuff you can download here.  Check it out...