Global Positioning System aka GPS

The GPS is a network of 24 navigation satellites orbiting the Earth that people can use to pinpoint their position. THe satellites orbit at a height of 20,000 kilometres(12,500 miles). A GPS receiver picks up signals from any of these satellites that are above the horizon. It uses information in each signal to work out how far away it is from the satellite. It can calculate its position from the

Top 10 things you must consider before buying a smartphone!

10.Think why you really need it.

This helps a lot more than you think. Before buying think of the main purpose of the smart phone that you are going to buy. Like if your main purpose is for capturing images then you must consider