Top 20 things that changed the World.... Smart Phone A Smartphone is a mobile phone with an advanced mobile operating system which combines features of a personal computer operating system with other features useful for mobile or handheld use. Smartphones, which are usually pocket-sized, typically combine the features of a cell phone, such as the abilities to place and receive voice calls and create and receive text messages,with those of other popular digital mobile decices and personal digital device,such as an event calender, media player, video games, wifi, GPS and many more. Radio Radio is the technology of using radio waves to carry information, such as sound, by systematically modulating some property of electromagnetic energy waves transmitted through space, such as thier amplitude, frequency, phase, or pulse width. When radio waves strikes an electrical conductor, the oscillating field induce an alternating current in ...
