A partial response maximum likelihood bit detection apparatus is disclosed for deriving a bit sequence from an input information signal. The electronic device includes a virtual keyboard and a touch screen. This is especially advantageous to unlock the wave-guide modes inside the body 230,330,430. The top layer of the chux and the sheet itself may be integrally connected. Using the user interface, a user may readily switch between users without wading through cumbersome interfaces. The apparatus has wheels to facilitate movement of the tank or tanks from place to place and a number of pockets for storage of items.