Computers manipulate electronic data according to a set of instructions called programs. It is this feature of the equipment which it distinguishes them from calculators and makes them very versatile. A computer program may include instructions that may vary from a few tens of million or even more. It can take years for a team of programmers to develop a program for a Web browser. The program may still contain bugs called errors. Some of the first models of computers were as big as a room. Modern computers use integrated circuits (ICs) to perform its complex functions. These circuits have contributed in the development of compact and light weight of equipment variants. Some simple teams today are small enough to mount in wristwatch.
The feature that distinguishes a team of other machines is their ability to be programmed. It simply means that you can store a set of instructions in his memory and then execute them according to the needs of the user. Central unit of processing (CPU) of the team directs its various components and establishes coordination in them. Technological advances have enabled to develop laptops. These laptops are portable or laptop computers. These devices generally do not weigh more than 18 kg or 8 kg. They usually sport a liquid crystal (LCD) display and a full QWERTY keyboard. Many variants of portable equipment such as personal digital assistants (PDAs) and internet Tablets are also available in the markets.
The first true laptop computer, entitled GRiD Compass 1101 was developed by Bill Moggridge in 1980. Apple released Macintosh Portable in 1989. It was the first team of the company which was powered by a battery. In 1994, IBM released its PowerPC laptop which ran on a UNIX based AIX operating system. Most present day notebooks feature displays a PC card and an active matrix of 30 cm with a resolution of at least 1024 x 768 pixels. The devices usually have an integrated video and sound chip. New models of laptops use lithium polymer batteries that are more powerful than the previous lithium ion or nickel metal hydride batteries.
Major manufacturers of computers such as Acer, Toshiba and Sony have launched several laptops high performance markets. VAIO is one of the most successful models of laptops from Sony. The word VAIO is an acronym for Video Audio integrated operation. Sports device XBRITE owned Sony display that it provides approximately 1.5 times better brightness than traditional LCD displays. The device comes loaded with Windows Vista operating system. The AR series of the device was the first in count with a Blu-ray disc recorder. SZ series of the device have an Intel GMA graphics chip 950 showing high-resolution graphics.
Many models of Toshiba laptops have recorded good sales. Tecra Portege and Qosmio are among the best models of Toshiba laptops sold. Portege M400-1115E uses a processor Intel Core Duo T2400. The device is equipped with 80 GB hard drive and weighs 2.1 kg. Runs on an operating system of Windows XP Tablet PC Edition. Sports a 12.1 XGA screen "." The device has support for Bluetooth and WiFi connectivities and is available in titanium silver color.
Acer Aspire laptop series have wide acceptance among users. Notepad is counted among the best in the sale of Acer laptops. The device boasts a 'Pebble' design and is aimed at general users. Aspire 4710 comes equipped with Gigabit LAN, hard drive of 160 GB and 1 GB of RAM. It runs on a LINUX platform. Manufacturers such as Dell, Compaq, Hewlett-Packard and Lenovo have also deployed some successful models of laptops in the market. Portable have given new dimensions to the computer. The devices have become a necessity for many executives and professionals.
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