1 Echocardiography (echo) is a painless test that uses sound waves to create pictures of your heart.  This test gives your doctor information about the size and shape of your heart and how well your heart's chambers and valves are working.
USB was designed to standardize the connection of computer peripherals (including keyboards, pointing devices, digital cameras, printers, portable media players, disk drives and network adapters) to personal computers, both to communicate and to supply electric power.
A USB adapter is a small and compact external, physical component that takes a device lacking USB function and converts it for operation with other USB technology like a port or device. These adapters are absolutely necessary for plug-and-play capabilities for a non-supported device. Card readers, webcams and Internet or LAN connections are examples that commonly call for the use of a USB adapter. If a computer is designed with a USB port, then an adapter is most certainly supported. A USB adapter is versatile in the way that it can offer a user the option to connect multiple devices for simultaneous operation.