I have TI-92 calculator; I like that it has a QWERTY keyboard. Unfortunately, it is slow. I do like that it doesn't have wireless; I generally prefer to use wi

I have TI-92 calculator; I like that it has a QWERTY keyboard. Unfortunately, it is slow. I do like that it doesn't have wireless; I generally prefer to use wired connections when possible. (If it has RS-232, then that would be good, I think.)