If you’re reading this, take a moment to thank Doug Engelbart. At a time when computers were big, expensive, isolated, finicky, and terribly difficult to program and use, this unassuming genius had a vision of a digital future that was so far ahead of its time that few of his peers took it seriously. He is widely credited with inventing the mouse, but that’s just a tiny part of his grand vision. Graphical user interfaces, interactive computing, the Internet, and more, owe their existence at least in part to Engelbart’s visionary work. Thank you, Doug.