An unknown word is additionally registered in a speech recognition dictionary by utilizing a correction result, and a new pronunciation of the word that has been registered in a speech recognition dictionary is additionally registered in the speech recognition dictionary, thereby increasing the accuracy of speech recognition. The transparent auxiliary member has an auxiliary design pattern corresponding to a vehicle type to form a part of the desired design pattern by superposing thereon, and allows the vehicle driver to see superposed design pattern displayed on the display device and the auxiliary design pattern. The femtocell may enable multicasting andor broadcasting data from one of the communication devices to two or more remaining ones of the communication devices.