On a recent flight back from Los Angeles, Heywood was reading iWoz, the memoir of computer legend Steve Wozniak, and he reached the page where the software whiz described himself as being the first person to type a word on a computer keyboard and have it appear on a screen.

“Stephen and [Matt Nagel] were the first people to think without typing and have their words come up on-screen,” he says. “This is world-changing technology.”