GPS navigation systems are devices that provide navigation and accurate positioning information. The Department of Defense created these devices in the early 1970's. They were created mainly to assist soldiers and military vehicles, ships and planes in establishing positions throughout the world. Today, the navigation systems are used both commercially and scientifically. In the retail world, GPS is used in cars, boats and other vehicles. The devices are also helpful for hiking, fishing and canoeing. The devices provide the user with accurate information and directions. In the scientific community, GPS is essential in the earth sciences. The devices are used by meteorologists to forecast the weather and study the climate. They are also used by geologists to study earthquakes and potential seismic activity.

Global Positioning Systems have become the darling of many young, technically savvy individuals. These devices have proven their worth in a wide variety of circumstances. Visit your nearest electronics shop and you will see them in every imaginable size, shape and color.

You have no doubt heard of in-car GPS systems and portable directional devices, but how do you chose which one to use? Pricing is one of the most obvious differences between the two options. Portable GPS devices that can be used in more than one vehicle are usually less expensive than built-in models. One portable GPS system, the Garmin Nuvi 350, has most of the same features of other in-car systems, and is in the $200 range. If you must have the latest extras, such as Bluetooth capabilities, the Garmin Nuvi can accommodate you if you are willing to spend a little more. The Garmin Nuvi 350 model employs NAVTEQ mapping features in addition to carrying a relatively low price tag.

It looks confusing when one is looking for a good GPS system because of the wide range of features, different brands and varied prices. There are hundreds of GPS systems available today varying in the price range of $150 to $900!. A very important thing to be kept in mind while looking for a good GPS system is the features available. What all features do we need? Whether our requirements are met by a standard GPS system or do we need to go in for a more sophisticated one with some additional capabilities If we need a simple GPS system we should not go for something above the price range of $500

Look around the Internet and local shops and check out some GPS brands. You may ask salesclerks what the most popular systems are. Once you've gotten an idea about the popular GPS systems, you may then evaluate the cost, quality and options. Jot down what you think are your top brands and narrow down to about 5 or less. Search for reviews and ratings for those brands/models online. Reading what other buyers have to say will give you an idea whether you should go for a certain model or not. You can even ask for advice from other people in online forums. Additionally, you should as for recommendations from people you trust and have bought GPS systems, such as family, friends and colleagues.