Computers have been here for a really long time. It seems though. But in really they were developed over the last century.
The first computers were massive and were as big as the rooms they were installed in. Needless to say they were pretty expensive too. The companies which had them installed had to spend a lot in their cooling systems and in have false floors which hide the extensive amounts of coils of cable they used.
The power in early computers was controlled by electron tubes. These were made of glass which became too hot when in use. They were also known as valves and needed tremendous amount of power.
During the 1950s things progressed and transistors were developed. They replaced the expensive valves as they were very cheap. Their small size led to the computers being concise too.
In the 1960s chips were developed. These were tiny electrical circuits built on a bar of silicon which replaced transistors. They were further modified to form the microprocessor chips which were equivalent to a million transistors.
Interestingly the development of the computers is linked with the US Soviet race into the outer space. But today the basic home personal computers are a lot more powerful than those used by the first of the astronauts. They are even more powerful than the enormous machines installed in corporations less than 40 yrs ago.
The latest development in the field of computers has been the introduction of a tablet computer by the name of iPad by Apple in the market. It is a platform where e-books, periodicals, games, multimedia, music, movies, and all the web applications converge together to give a complete feel to the user. It weights only about 700 grams.
The iPad uses multi-touch finger sensitive technology without a pressure-triggered stylus. The iPad is mobile so it uses the WiFi or a 3G mobile data connection to browse the internet. In the first 80 days of its launch it was able to sell 3million devices worldwide.
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