Symbian

Very powerful for general purpose development. The Symbian based S60 platform is strongly supported by Nokia with some support from other device manufacturers. In Japan NTT DoCoMo's Symbian based MOAP platform is also well supported by a number of manufacturers (Fujitsu, Sony Ericsson Japan, Mitsubishi and Sharp amongst others). It should be noted, however, that MOAP is not an open development platform. Another Symbian based platform, UIQ, is less well supported (principally by Sony Ericsson and Motorola). Currently large device deployments in Europe and Japan, with little penetration in the US market.