Weather Another feature that is becoming increasingly available is weather for a location. The system will tell you weather at a certain location on map i.e. at that beach location you are planning to visit.

When you want to plan a journey you will need to enter start and end destination, this can be done in a number of ways, city, street and house number. The street intersections, post codes and a location chosen on on screen map. The start can be done in same way with addition of present location as starting point (remember unit knows where you are). There are then itinerary or way points, these allow you to program destinations along way. Finally you are usually presented with choices of routes with choices like, Fastest Route, Shortest Route, Scenic Route, Avoid Motorways etc some have choice to avoid toll charges.

Fitting The units can be fitted into car in a number of ways but 2 most popular ways are with a mounting bracket that has a strong suction cup that sticks to windscreen. The second way is a bracket that fixed to cars air vents, this method can be very good but required a fixing for each type of car. The unit is then fitted to brackets and adjusted to best viewing angle.

There are dozens of systems available now with a variety of choices of options available. You need to choose which of above options are important to you and then choose until that best suits you or suits you price range.

You can see a large variety of different units at different costs at my favourite comparason site www.wangled.co.uk just type in "Mobile GPS"

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Aim for a rate of 75 Hz for a monitor up to 17 inches in size and 85 Hz for any larger monitor.

Another consideration for CRTs is dot pitch. The smaller dot pitch, sharper image. Opt for a dot pitch of 0.26 mm or smaller.

CRTs function very well at multiple resolutions, can display detailed graphics and can be viewed comfortably from wider angles.

*LCD screens*

One of primary disadvantages of LCDs when compared to CRTs is their limited viewing angle. When viewing a LCD straight on, it looks great. But screen will appear washed-out if you move your head over to side and look at it from a wider angle.

Also, LCDs are optimised to perform at a single resolution. Low-end LCDs have viewing angles of only 100 degrees, which won't give everyone crowded round your desk a clear view.

For a standard 15-inch LCD, try to get a 140 degree viewing angle. Increase that by 20-40 degrees when shopping for an 18-inch LCD.

The brightness of LCD monitors is an important factor. LCD monitors have several backlights that provide illumination. The backlights in a LCD are good for 10,000 to 50,000 hours of operation. Ensure that backlights come with at least a one-year warranty. Messenger: http://www.hardwaresoftwarearticles.com/archive/index.php/f-7.html

*Making a choice*

LCD screens generally cause lesser strain to eyes than CRT monitors.

CRTs have better graphics, but they tend to occupy five times as much space.

If you are a gaming freak, then a CRT is a better option as it is best for any graphic interface.

If you want sleek look, an LCD is meant for you. It is widely used in banks and treasury and trading rooms.