I think all of the USB-A jacks i have are made out of a sheet of metal folded over on itself, with the join on the bottom. You can tell which way up a jack is b

I think all of the USB-A jacks i have are made out of a sheet of metal folded over on itself, with the join on the bottom. You can tell which way up a jack is by looking for the join. See this picture of some random bitcoin gizmo: https://www.ccn.com/wp-content/uploads/2014/11/usb-top-bottom-together.png https://www.ccn.com/wp-content/uploads/2014/11/usb-top-botto... It's certainly not as easy as with ADB, but it only takes a quick glance to orient a USB jack. I can't be the only person to have noticed this.