Gate5 is a technology company specialising in location-based applications for mobile terminals and the Internet. For the web-based part of Gate5's product family, preview developed an interface concept that allows the configurations to be tailored exactly to the respective product. Web-based products are Yellow5, Map5 und City5. Yellow5 is an interactive yellow pages, which offers an effective search function and displays the locations found on a map. On top of this, a routing function enables users to send information to mobile terminals. Map5 enables users to search for addresses and have these displayed on a map. Locations can either be sent by E-Mail or SMS, and meeting points subsequently arranged at these locations. The city portal City5 contains useful information for both tourists and natives of a town or city.