So I read about 50 or so pages of the Owner's Manual to figure out how to do certain things that I commonly use my calculator, i.e. complex arithmetic, system of equations, etc. Needless to say my 35s has spoiled me rotten. A few notes:

* Turns out the visible dual stack of the 35s was more than a mere convenience.

* Clearing out the imaginary part of complex input is a pain on the 15c, let alone getting it in there in one fell swoop.

* Raising to a complex exponent is doable on the 15c...this was a no-go on the 35s, or at least I never figured out how to do it.

* No built-in constants library on the 15c. *sigh*

* Complex arithmetic assumes 15c stack is in Cartesian form, which means gotta remember to convert from polar before hitting that operator.

* The ability to easily view just the mantissa is nice and could prove to be useful.

I'm just making small talk. =) Any "old timers" have suggestions or words of 15c wisdom for a young aspiring engineer?

P.S.

Saw this the other day:

http://hp-12c-calculator.com/?page_id=2Looks convenient and sexy, although I'm not so certain that folding top will stand the test of time. Too bad they're out of stock.