USB, which stands for Universal Serial Bus, was first introduced in 1996 by a few American companies, including Intel Corporation, IBM, and Microsoft Corporation. It’s meant to serve as a simpler method of connecting hardware to PCs. Before this invention, a PC normally had one or two serial ports, mouse & keyboard ports, a parallel port, and probably a joystick port.
A USB port served as a standardized method to connect a variety of devices while providing significant advantages in speed over other connection methods.
At first, the adoption of USB technology was slow. This was a result of the fact that computer manufacturers were slow to integrate USB ports into their machines. Peripherals manufacturers, on the other hand, were also slow to introduce USB products to the market. To make matters worse, when the technology was first released, operating systems only offered a limited amount of support.
However, the story changed in 1998, after the first generation of Apple Inc.’s iMac was introduced into the market. This action by Apple effectively forced other manufacturers to follow the standard. Since then, several devices, including cameras, webcams, printers, scanners, and keyboards make use of USB.
If you look at the specs you will see the C920 uses a USB 2.0 protocol: http/logitech-en-amr.custhelp.com/app/answers/detail/a_id/28927/section/troubleshoot/crid/405/lt_product_id/9442/tabs/1,3,2,4,5/cl/us,en It is USB 3.0 ready which means it can be connected to a USB 3.0 port but you won't get the USB 3.0 bandwidth since it uses a USB 2.0 protocol.You might find the user comments on Amazon useful: http/www.amazon.com/review/R33C7F5AJ7Z4A5