The ubiquitous USB Type-A. Released in 1995, Type-A is for host computer connections. You likely still have a compatible port on your desktop machine today. In 96, the chunky Type-B connector came along for connecting to peripherals. Known to many simply as printer cable, it also connected to Arduino. Type-B is a bit large for a cell phone, so in 2000 Mini-B was introduced. Followed seven years later by the flatter, more reliable, micro-B connector. With the release of USB-3 came extra chunky Type-B connectors, with backward compatible sockets, odd but cool. Eventually, we take a big step forward with USB-C. It's faster, reversible, and uses the same connector for host and peripheral. It's the one connector to rule them all. Until the next one comes out.