Hi!
I first learned to program my old TI-83 Plus last year (in Basic), and since then I've become more interested in calculator programming, leading to me getting a TI-89 Titanium, fooling around with assembly for the 83+, and, by a sort-of direct path, joining this site (even though I discovered it two months ago).
I have some knowledge of Z80 assembly, but it's very sparse at the moment, as is my knowledge of C for the Titanium, something I started learning only recently.
I also can do computer programming, in Visual Basic .NET and in Python.