Provided are a server, a terminal, and a method of providing Augmented Reality using a mobile tag in the terminal which is accessible to the server through a wiredwireless communication network. A client computer may communicate with the computing grid via a dropbox configured to receive and distribute data between the client computer and the grid. A routing database is updated to include the routes. A first user input requesting reuse of one of the previously displayed expressions is received and one of the previously displayed expressions is displayed for editing by the user. Power conversion is achieved at high efficiencies due to the recycling of energy in parasitic capacitance. The communication apparatuses include a transmitterreceiver configured to access said data transmission line at timing periods peculiar to respective communication apparatuses in synchronism with a common system clock among respective communication apparatuses.