I don't like the way the hp-11c operates. Ended up going for TotalCalc too! I think the display could be improved to reuse already typed stuff, like a Casio 9800 series. But it's the more user friendly and does what I need it too.
BTW, found a very old bug goldy one by some Japanese guy it seems on fish disk 210. It has a whole bunch of programmer friendly stuff like bitwise operations. Most scientific stuff is there and also has a plotter !