Series 80 (software platform)
Series 80 (formerly Crystal) is a mobile software platform introduced in 2000 that uses Symbian. It was made by Nokia for their enterprise and professional level smartphones. All devices that use it have a screen resolution of 640×200 pixels and a full QWERTY keyboard. The large size of the screens are used to good effect, but software has to be developed specifically for it and the market for it was relatively small.