Nokia Series 90

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Nokia Series 90 is a platform for mobile phones that use Symbian OS. It is developed primarily by Nokia, and currently used only in the Nokia 7700 and 7710 phones.

Essentially, Series 90 is a development of the Psion Eikon GUI as used on the Series 5, Series 5mx, Series 7 and netBook machines. It has been modified to be controlled entirely through the touchscreen, supplemented by the 77x0's seven hardware buttons and rocker-dial. The 7700 had only an on-screen keyboard for text input; the 7710 also adds basic handwriting recognition. Applications now have only a single menu tree, accessible from the title bar at the top of the screen; there is no Exit or Quit option in most apps; and a button bar has been added to the right hand side of the screen, resembling that of the Nokia Communicator smartphones.

Unfortunately, Series 90 is completely incompatible with Series 60 and UIQ, the most popular platforms for Symbian smartphones. Some applications from Series 80 devices such as the Nokia Communicator 9300 and Nokia Communicator 9500 will function under Series 90, though.