Using multiple monitors
A good way of working is to use multiple monitors to show work screens displaying separate applications or different windows of the same application instead of switching between them on a single screen.
Common Multi-Monitor Questions –
Note that USB is not a graphics standard, but monitors that connect using the USB connection interface are now available.
It is possible to buy a USB dock and an external USB graphics adapter to connect multiple monitors. Each USB graphics adapter is connected to the USB dock.
Using Multiple Monitors with The HP USB Dock & USB Graphics Adapters [Video] –