Laptops

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The typical components of desktop computers are all to be found in laptops. Therefore, laptops include the display, the keyboard, a pointing device ? touchpad or pointing stick, and the battery. The difference lies in the fact that all these components are to be found into one single unit that is also portable. The rechargeable batteries of laptops get their power from an AC/DC adapter and their capacity enables them to be functional for several hours.

The thin shape of the devices definitely led to their being called notebook computers. Laptops are usually 0.7 ? 1.5 inches thick and their dimensions range from 10×8 inches (13 inch display) to 15×11 inches (17 inch display) and up. They are not heavy, weighing between 3 and 12 pounds. The design of most laptops as the flip form factor, is meant to protect the screen of the computer when it is closed.

Personal computers became feasible at the beginning of the 1970s and not long after those years the idea of portable PCs ? laptops, appeared. The person who imagined this was Alan Kay of Xerox PARC. In 1972 he put his idea on paper under the name of Dynabook. The first laptops were available on the market only in 1981. The Osborne 1 and then, in the same year, the Epson HX-20 were the first portable computers commercially available. Since then laptops have developed and become more and more proficient.

Unfortunately, besides the obvious advantages of laptops, there are also some disadvantages. The main and most important advantage of laptops is evidently their portability. In addition, laptops have the ability to work on battery power in the event of a power outage. Laptops are also more economical and do not produce as much heat as desktop computers do. The disadvantages of laptops come from the standardization and compatibility issues. In spite of some accepted world standards for manufacturing the peripherals and add-in PC cards to desktop computers, the processor and hard driver manufacturing part does not fall subject to any international regulation yet.

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