Protective covers and cases for tablet computer; Cursor control devices; Electronic pens (visual display units); Light pens; Magnetic pens; Earphones and headphones; Electric cables; Renewable battery system to provide backup power; Loudspeakers; Heat sinks for use in computers; Heat sinks for use in electronic components; Central processing unit (CPU) fans; Central processing unit (CPU) coolers; Metal depository housing specially adapted to contain photographic and computer components; Electrical power supplies (other than generators); Uninterruptible power supply apparatus (battery); Cases adapted for compact discs, DVDs and other electronic media; Removable hard drive based computer backup systems; Internal cooling fans for computers; Notebook computer cooling pads; Fans adapted for use with computer components