G-Book

right|thumb|300px|Lexus navigation system with G-Book/G-Link ('G'-icon button on touchscreen)

G-Book was a telematics subscription service provided by Toyota Motor Corporation in Japan for its Toyota- and Lexus-branded vehicles. G-Book allowed users to link with cellphones (such as the Toshiba T003 cellphone), personal digital assistants (PDAs), personal computers (PC) and G-Book equipped cars across Japan. It is based on the former GAZOO infrastructure (renamed Toyota Media Service Corporation) of Toyota's membership-based information service and membership system, and it provides interactive information services via vehicle installed touch-screen wireless communication terminals. It also incorporates information from Toyota Mapmaster Inc. which updates digital mapping information and is used by various international companies.