He uses a 'laptop' for business when he travels.
(..) I have something that might make you feel better. I got you a new computer! How could you do that? Do what? Choosing a new laptop is an incredibly personal ritual. You have taken away weeks of agonizing thought, tedious research, sleepless nights filled (..)2016 TvShow: The Big Bang Theory Title: The Solder Excursion Diversion Season: 9 Episode 19
(..) You're breaking up. I didn't understand your e-mail. Ah. Yeah, I had to get a little creative because the S, R and M keys on my laptop stopped working. "Deaw Aby, could you pleathe dwive be to the twain thtow thubtibe tobowow?" So, is that a yes? (..)2016 TvShow: The Big Bang Theory Title: The Solder Excursion Diversion Season: 9 Episode 19