A-Envelopes and Baronial Envelopes can share common sizes-example: 5-1/2 Bar is the same dimension as A2, the defining differences are the flaps and the side seam construction.
Type device into the search box. Double-click Universal Serial Bus controllers to view the USB drivers on the PC. Review the list of drivers to find an object that includes Enhanced Host Controller or a similar term in the name to confirm that the computer comes with high-speed USB. Check the back and front of a desktop computer for two or more USB ports; the ports are often found next to the PC's audio jacks. Check the right and left sides of a notebook or netbook computer to find the device's USB ports. The ports will often be labeled USB 2.0 or similarly.
For example, looking at the USB View screen shown in Figure D, I can immediately tell that my example system is equipped with 8 USB ports. I also see that the Microsoft Keyboard is connected to Port 1 of a 4-port USB hub that is connected to Port 2 on the computer. I can also tell that the 4-port USB hub is a USB 1.0 device because it is showing up under the Standard OpenHCD USB Host Controller. I recently found myself on a USB troubleshooting expedition and needed to be able to get a visual image of what device was connected to what USB hub number and port number.