Definindo um Smartphone ..

"A smartphone is generally considered any handheld device that integrates personal information management and mobile phone capabilities in the same device. Often, this includes adding phone functions to already capable PDAs or putting "smart" capabilities, such as PDA functions, into a mobile phone. .. .. "
From here ..

"Most common operating systems are Symbian (developed by a group including Nokia), Windows CE (developed by Microsoft), BREW (technically a platform, developed by Qualcomm), Linux and Palm OS. In an August, 2004 report by In-Stat/MDR, Symbian-based smartphones will dominate over the next 5 years. Microsoft's platform will be second by 2006."