(1) A cellular telephone with built-in applications and Internet access. Smartphones provide digital voice service as well as any combination of text messaging, e-mail, Web browsing, still camera, video camera, MP3 player, video player, television and organizer. In addition to their built-in functions, smartphones have become application delivery platforms, turning the once single-minded cellphone into a mobile computer. See smartphone keyboard, PDA, Pocket PC, Symbian OS, Palm, Blackberry, Windows Mobile, iPhone and Android.

It Took More than a Decade
In 1994, IBM and BellSouth introduced a combination phone and PDA called the Simon Personal Communicator. Often touted as the first smartphone, the Simon was costly and heavy (see personal communicator). It took another decade before smartphones became small and powerful enough to be widely used, but since the advent of the iPhone, Android and BlackBerry Storm, smartphones are creating a revolution (see "Smartphones - Truly Personal" in hot topics and trends).

(2) (Smartphone) Microsoft branded the term with a capital "S" within its Windows Mobile Platform.