A computer in a cellphone. As well as a phone, typically it will include both stills and movie cameras, music player, enough computing power to run sophisticated programs such as office sofware and games, satellite navigation, and gigabytes of storage. The most famous is Apple’s- iPhone, but all the major manufacturers make them and they are where the IT industry is mostly focussed at the moment. Some think that they will completely replace most personal computers.
— Computer Science