Nokia has defined four main UI categories for the future devices. The four UI categories will not only reflect the screen resolution but also the UI style, navigation, number of keys and the driving features and technologies for each category. The categories are according to the screen sizes; Series-30 (96x65), Series-40 (128x128), Series-60 (176x208) and Series-80 (640x200...240). In addition to those there will be number of terminals with 84x48 display resolution in the short term. The 84x48 series will eventually evolve into the 96x65 category. More information of the various categories will be available later in Forum Nokia. This should decrease the diversity of screen and display characteristics and thereby ease the development work.