477
All the other brands went along
(slrpnk.net)
This is a most excellent place for technology news and articles.
Nah, USB-A was the best since it replaced serial ports (esp PS/2, which was much harder to plug in) and outlived/outclassed FireWire. USB-C is the best thing since HDM (screw you VGA amd DVI), which was the best since USB-A.