Communication system, apparatus, and method

The communications system comprising:

• a board;
• a storage unit for storing information;
• a portable display apparatus comprising;
• a memory for storing identification information,
• a first transmitter for transmitting information,
• a first receiver for receiving information,
• a display unit for displaying information,
• the portable display apparatus having portability such that the board allows the portable display apparatus to be placed at an arbitrary position upon the board, and
• a housing;
• and
• a communication apparatus comprising;
• a second receiver for receiving the identification information from the portable display apparatus when the housing of the portable display apparatus is placed upon the board,
• an acquisition unit for acquiring from the storage unit the information related to the identification information which is received from the portable display apparatus,
• a second transmitter for transmitting to the portable display apparatus the information which is acquired by the acquisition unit;
• wherein when the housing of the portable display apparatus is placed on the board, the portable display apparatus receives the information acquired by the acquisition unit from the information by the first receiver and displays the acquired information on the portable display apparatus.