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Laptops - A further view
The term `laptop` – or `notebook`, or `mobile`– computer describes a personal computer that is compact, and light enough, to be portable, and is capable of operating away from a source of mains power – in other words, on batteries – for adequate periods.
These computers, nowadays, are capable of replicating all the features and functionality of their conventional desktop cousins, and are in no way poor relations; any functionality that they do lack may, in fact, be a deliberate omission for the sake of portability. Laptops are available in a number of different categories, usually categorised by the overall weight – and hence the portability – of the system.
Laptop Features & Benefits
The reason why conventional, CRT, or `Cathode Ray Tube`, computer monitors are typically a foot and half deep, and weigh more than 40lbs, is the presence of apparatus – the CRT, itself – for firing electrons at the phosphor coating of the screen. Laptop computers employ an entirely different technology – known as LCD, or `Liquid Crystal Display` – which allows screens to be very thin, and lightweight. <br><br>Laptops with screen sizes between 10 and 17 inches, measured diagonally, are available. You should be aware, however, be aware that a very small screen – while affording a compact, and lightweight laptop, overall – may be tiresome to look at for long periods. A large screen, on the other hand, may reduce the portability, and the battery life, of a laptop to an unsatisfactory level. A laptop screen of 14, or 15, inches in diagonal measurement is often a satisfactory compromise, at least for most applications. The Dell Inspiron 1525 Laptop, for example, is a slim, lightweight model with a 15.4 inch display.
Most laptop screens, nowadays, are colour, and feature so-called `active matrix`, or `thin film transistor` (TFT), technology for the highest image quality, in terms of brightness, and clarity. As the name suggests, this technology uses one, or more, transistors to control the behaviour of each picture element, or `pixel`, in an image. The total number of pixels of which a screen, or an image, is composed is what determines its `resolution`, or, in other words, its sharpness and clarity. Resolution is often quoted as the number of rows and columns of pixels that make up an entire laptop screen. A standard, VGA screen is capable of displaying a maximum of 640 x 480 pixels, or 307,200 in total. Other popular screen resolutions include XGA, at 1024 x 768 pixels, and UXGA, at 1200 x 1600 pixels. Generally speaking, the higher the total number of pixels, the better. The Dell XPS M1730 Laptop, for example, features a 17 inch screen, with WUXGA, or 1920 x 1200 pixel, resolution.
Conclusion
Each new generation of laptops comes closer, and closer, to replicating the performance and functionality of conventional desktop computers, and it would be fair to say that you can, nowadays, do just about everything with a laptop that you can with a desktop. Performance, at least in terms of raw processing power, may be a little lower, but not enough to be significant for most applications. Battery technology – particularly that based on lithium chemistry – is being improved continuously. Portability is the obvious attraction of a laptop, but technological advances and price reductions mean that laptop from UK Offer computers and software for general computing, gaming, etc. are a viable alternative to a desktop.