We have been using USB connectors for three decades now—yet many people don’t even realize there’s a Type-B connector. For most, there’s the older, rectangular USB-A connector, the modern, petite USB-C connector, and a few micro-USB connectors in between. I know folks who think the square-ish, chunky, beveled connector hiding behind their printer or connecting their audio gear is actually a proprietary connector. But guess what—that’s actually a USB Type-B connector—and here’s why this forgotten middle child of tech is still essential.