GPS systems came into existence when the US Ministry of Defense was planning for a more reliable way to locate a man or vehicle in the world. For this they invested billions in a sophisticated satellite system to exactly find the position of a device on the earth's sphere. There are three essential components required for the success of GPS systems. These components are made up of 24 satellites, GPS Receivers and the ground stations. It is vital that all the components must work in harmony with each other or there will be incorrect results or readings.

Undoubtedly this technology has become common part of modern day devices that range from boat mapping systems and car navigation systems to modern computers. Its main uses are:

1. Location - Now one can easily locate his/her current location anywhere in the whole globe. This is particularly helpful if you need to find someone in remote areas of the world or at sea.

2. Navigation - It is quite obvious that if you are aware of your current position and also of the objects around you then you will be able to navigate the best way from one place to another.

3. Tracking - One can even check the movement of people and objects in the world.

4. Mapping - Now the complicated or tough maps can be made in a more correct way with the help of GPS systems. It is mainly used in areas that have not yet been properly mapped.

Take for example if GPS systems are there in your car, the device can immediately pinpoint your exact location in the world. And if you tell where you want to finish up, the GPS system will find out the best route for you. It would be really great if all mobile phones too have GPS systems in them. Fortunately nowadays GPS systems are now available at more reasonable prices.

Hence we can say that GPS systems are continuing to grow in popularity. It is considered that one day GPS systems will become as common as the telephone or television. If used properly, GPS systems can do wonders for you.