15B3 15-Inch All-in-One Desktop Touchcomputer (AccuTouch Touch Technology, No O/S, USB, Antiglare Surface Treatment) The Elo TouchSystems B-Series All-in-One touchcomputer platform simply provides in a compact design, more flexibility with a choice of configuration and connectivity options, more serviceability with easy access to key components, and more processing power. In addition, a wide array field-installable peripherals, spill-resistant sealing, and a selection of input/output port connection options make the B-Series both versatile and powerful. It is designed with the future in mind, allowing easy field serviceability of all of the main components.