It finally eliminates the need for PC users to figure out which serial port to plug a device into, or the need to install an expansion card in their system. It even eliminates the headaches associated with modifying hardware settings and installation of software drivers. Imagine only one size plug on all your components. Just simply leave your computer on, power on the device your plugging into your computer, and plug it into the USB port and watch your computer automatically detect the device and install it. The record was recently set at 111 peripheral devices ranging from mice, joysticks and keyboards to digital speakers and video conferencing systems.
Most computers only have two USB ports available.
If you want to add more that two devices, a USB hub can be added which is a device with multiple USB ports. There are currently over 500 companies supporting USB and over 100 USB compatible devices available. As a matter of fact, before you add anything to your computer, see if it is available with USB support. You will truly be amazed at how much it will simplify the installation. Something actually simplifies the use of a home computer.