A detachable power supply apparatus for use with electrical appliances including removable temperature control devices includes a mounting panel on the temperature control device to which an electrical connector on a power supply cord is magnetically and electrically coupled. Solid-phase chemistry, photolabile protecting groups, and photolithography are used to achieve light-directed spatially-addressable parallel chemical synthesis. The network computer is operative to compute overall levels of comfort for each location by using a weighting factor for that location in combination with the indications as to levels of comfort These overall levels of comfort are sent to an HVAC control for further analysis prior to controlling the HVAC system that is to provide conditioned air to the locations. Additionally, the ATV may also include a tree guard positioned on each side of the ATV to protect the rear storage and side compartments and to prevent cargo on the rear storage compartment from being dislodged by trees that might protrude into the rider’s path. An information address corresponding to the object is then used to access information and initiate communication pertinent to the object.