42 | GlossarySService Tag ‑ A bar code label on your tablet that identifies your tabletwhen you call Dell for customer service or technical support.Shortcut ‑ An icon that provides quick access to frequently usedprograms, files, folders, and drives. When you place a shortcut onyour Android Home screen, touch the icon to open its correspondingfolder or file without having to find it first. Shortcut icons do notchange the location of files.Sleep mode ‑ A power management mode that shuts down allunnecessary computer operations to save energy.VV ‑ volt—The measurement of electric potential or electromotiveforce. 1 volt appears across a resistance of 1 ohm when a current of 1ampere flows through that resistance.VAC ‑ voltage in alternating current—A mathematics of AC voltages,as alternating currents are caused by alternating voltages.VDC ‑ voltage in direct current—A measurement in a DC system. Thecurrent flows directly, in one direction in the circuit, and flows at aspecific, constant voltage.WW ‑ watt—The measurement of electrical power. 1 watt is 1 ampere ofcurrent flowing at 1 volt.Wallpaper ‑ The background pattern or picture on the Home screen.Wi-Fi ‑ A technology as a synonym for WLAN (wireless local areanetwork) connects to the internet when within range of a wirelessnetwork.Widgets ‑ A small application which resides on the Home screen andprovides quick and easy access to information.WXGA ‑ wide‑aspect extended graphics array—A video standard forvideo cards and controllers that supports resolutions up to 1280 x 800.