Sure, Jack Dorsey created Twitter and co-founded Square, the payments business he also runs, but the two technologies he’s “really fascinated” with right now? Voice input and live video streaming.

Dorsey, 38, has a history with the former. He developed carpal tunnel syndrome in high school from long hours of programming, so he sought other ways to interact with his computer and give his wrists a break, which included giving rudimentary dictation programs a shot.

“It was just terrible,” he told high school students during a wide-ranging discussion at this year’s Code Camp, the week-long program from Square that teaches teens to code and helps them explore a career in engineering. Read more…

More about Twitter, Jack Dorsey, Code, Diversity, and Square