Duh... computers, of course. Currently, I volunteer answering questions on forum for Excel. I have been fortunate to have been awarded MVP status by Microsoft (discipline now is Excel, but earlier it was the compiled version of Visual Basic) for the last 14 years. I have also been awarded MVP status on the MrExcel forum where I so the vast majority of my volunteering efforts.
As for TI related items, I was the programming member of the old FFF Software company that put out two commercial games... TI-Asteroids and Shuttle Command.