Kindle
Watchismo, a stupendous vintage watch blog, has a drool-inducing feature on the history of calculator watches. (I would have blogged this post about the amazing, domed Rolex diving watch, but at $250,000 a throw, they're more heartbreaking than wonderful.)
LinkPlayboy magazine, June 1975...A gift-giving advertisement with ideas for dads & grads included this guy hidden in the back. The Calcron LED Wrist Calculator. Likely the first public offering of it's kind.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.