In a method for identifying a table of contents in a document, text fragments are extracted from the document. The second wall element has a contact zone adapted to contact a surface of a user in use. Further engaging a lane keeping system when the lane centering system fails to keep the vehicle within the lane, the lane keeping system configured to return the vehicle to the lane, when the vehicle leaves or is leaving the lane. Due to the nature of the existing clocking scheme, backward data transfer from the display side to the computer requires a backward clock.