advantage of using USB

USB has got many advantage over other type of ports being used in PC's like serial and parallel.
User is having a very good rewarding and productive experience.

• Easy to use: It's easy to use, just simply plug-in and start using any device with PC. Simply "Plug and Play". Just connect disconnect and reconnect any device without rebooting PC.

• High Speed: It has speed of around 12Mbits/sec, which is around 100 times faster than serial ports. and with USB 2.0 specifications speed of 480 Mbits/s will be available.

• Expandable: Normally PC's come with 2 or 4 USB ports, which can be extended for use upto 127 ports using USB hubs.

• Reduced Size: Size of USB port is quite small than Serial ports and Parallel Ports.

Adding peripherals to PC using USB is so easy that anyone can connect. USB has replaced all different kinds of serial and parallel port with just only one type of port that's "USB". No need of add-in Cards, DIP switch settings or don't need to restart PC. 

Since most of PC's come with 2 USB ports, so you can connect any extra device using a peripheral USB HUB which have additional ports and let you daisychain multiple device at a time.

Using USB you can have two way communication, which means you can use your PC to control the connected device like synchronizing  contacts, media files etc.