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.
USB Data Cables. USB or Universal Serial Bus is a common PC connection standard that lets you attach a variety of peripherals including hard drives, mice, keyboards and media players. USB connectors come in several variations, known as Type A, Type B and so on.f a cable has one kind of connector on one end and a different one on the other, you can bet itâs an adapter of some sort. Samsung makes adapters that can help you take full advantage of your devices and solve innumerable interconnection problems. They come in a few major categories: 1  Connection adapters.