тЮЦDesktop model : Desktop model means computer that are designed to fit comfortably on top of a desk, with the monitor sitting on top of the computer. Desktop model computers as compared to the tower model are broad and low, whereas tower model computers are narrow and tall.
тЮЦNotebook computer : Also called ultra book. These are extremely popular because they are extremely lightweight and portable. Because of their small size ,typically less than 6 pounds or lesser than that,they have become so popular. These flat-panel technologies can produce a lightweight and non-bulky display screen. The quality of notebook display screens also differs considerably. Modern notebook computers are very similar to personal computers in terms of computing power.
тЮЦLaptop computer : Laptop are now a days also called notebook computers .These are small and portable .You can make them sit on your lap and work on them.
тЮЦSubnotebook computer: Subnotebook computers are portable computers that are even lighter and smaller than a full-sized notebook computer. They are light weight because they use a small keyboard and screen as compared to a notebook computer.
тЮЦHand-held computer : These computers are portable enough to be carried in oneтАЩs hand. They are extremely convenient for use but due to extremely small size of their keyboards and screens they have still not succeeded in to replacing notebook computers.
тЮЦPalmtop : These computers as the name suggest fit in your palm. Due to extremely small size their use is limited to phone books and calendars .
тЮЦPDA : PDAтАЩs have electronic pens rather than keyboards for inputs unlike laptop. They also incorporate handwriting recognition features. and voice recognition technologies i.e can also react to voice input . PDAs are also called palmtops, hand-held computers and pocket computers.
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тЩ╗я╕ПTypes of ComputersтЩ╗я╕П
There are a number of computer options to select from in todayтАЩs computer and technology market. Today, computers come in different sizes and styles. Current computers are made in a way that they fit people with different needs and requirements. Apart from the initial desktop and laptop computers there are other types of computers available on the market. Netbook and tablet PCs computers are now available, and a number of people are using them for different purposes.
ЁЯФ╕Based on Work
тЮЦAnalog : The analog computers are computer systems that measure variations in quantities such as temperature, voltage, speed, etc. Analog computers are known to measure the data that varies continuously. Other examples of analog computers include Voltmeter and Ammeter.
тЮЦDigital : Digital computers are the computer systems that count things by manipulation of certain discontinuous numbers and letters through representation of binary digits (also called bits) in contrast to analog computers that measures the variations in quantities). In other words texts and graphics are treated numerically. Today the digital computers have replaced the analog ones .Examples of digital computers are desktop , personal computers, workstations,tablet PC etc
тЮЦHybrid : Hybrid computers as the name suggests are a good mix of analog as well as digital computers, using an analog computer front-end, which is then fed into a digital computerтАЩs repetitive process. Hybrid computers are used for scientific calculations, in defence and systems.
ЁЯФ╕Based on memory Size and performance
тЮЦSupercomputer : Supercomputers are the biggest and fastest computers. They are designed to process huge amount of data. A supercomputer can process trillions of instructions in a second. It has thousands of interconnected processors. Supercomputers are particularly used in scientific and engineering applications such as weather forecasting, scientific simulations and nuclear energy research. First supercomputer was developed by Roger Cray in 1976.
тЮЦMainframe computer : Mainframe computers are designed to support hundreds or thousands of users simultaneously. They can support multiple programs at the same time. It means they can execute different processes simultaneously. These features of mainframe computers make them ideal for big organizations like banking and telecom sectors, which need to manage and process high volume of data.
тЮЦMiniframe computer : It is a midsize multiprocessing computer. It consists of two or more processors and can support 4 to 200 users at one time. Miniframe computers are used in institutes and departments for the tasks such as billing, accounting and inventory management.
тЮЦWorkstation : Workstation is a single user computer that is designed for technical or scientific applications. It has faster microprocessor, large amount of RAM and high speed graphic adapters. It generally performs a specific job with great expertise; accordingly, they are of different types such as graphics workstation, music workstation and engineering design workstation.
тЮЦMicrocomputer : Microcomputer is also known as personal computer. It is a general purpose computer that is designed for individual use. It has a microprocessor as a central processing unit, memory, storage area, input unit and output unit. Laptops and desktop computers are examples of microcomputers.
ЁЯФ╕Personal Computers
Personal Computers are computers that are designed for an individual user. These computers are small and a relatively cheaper. In price, personal computers can range anywhere from a few hundred pounds to over five thousand pounds. Personal Computers use the microprocessor technology as they enable manufacturers to put an entire CPU onto one chip. They serve myriad purposes and can be put to use by various businesses for word processing, accounting, desktop publishing, and for running spreadsheet and database management applications. People across the globe use internet for playing games,surfing net and other online applications at their homes and personal use.
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