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 data transfer cable is a great way to move data from an older computer onto a newer one. A number of vendors are producing USB cables that allow you to connect two computers simply through USB ports instead of traditional wireless, Ethernet or other Internet-based connections.