A computer is basically a machine which is able to perform certain logical or arithmetic operations automatically without the need for user input. Modern computers are able to do wide spectrum of operations such as word processing, scientific calculation, image manipulation, database management and so on. Computers have helped us in our daily chores by increasing efficiency and decreased the cost of doing business.
A computer system consists of different elements which together allow it to accomplish specific tasks. The input device refers to the hardware which connects to the CPU. The output device refers to the external display or keyboard. It is also possible to incorporate a mouse or a touchpad for input devices.
There are many different types of input devices and output devices available in a computer case. Some of these are speakers, printers, scanners, USB drives, modems, hubs, USB cards and so on. A motherboard is the central component of the computer case along with all the PCI bus slots. The number of PCI bus slots is determined by the processor type and the manufacturer.
Desktop computers are more powerful than laptops. Desktop computers are designed for use by one person at a time. Laptops are intended for use by many people at a time. There are many different types of desktop computers available such as notebooks, netbooks, notebooks, minis and standard desktops.
Mouse and keyboard are the most significant computer connections for your desktop computer. Other connections used in desktop computer are DVD burner, CD burner, printer, scanner, monitor and so on. There are many different types of mice and keyboards available in the market.
Hard disk is used to store data. The size of hard disk will determine the speed of your computer. Memory is another important device. Memory devices are used for programs that require lots of resources such as video games. Video and music files are stored in memory. The size and speed of hard disk and memory will determine the performance of your computer.
Some other devices required by desktop computers are sound card, optical drive, video camera and scanner. Video card is the device that allows the computer to process graphics such as photos, movies and so on. The sound card adds sound to the computer. Optical drive is used to transfer data from the hard disk and the memory.
Computer is an electronic device that stores data, programs, documents and so on. All electronic devices need a power supply. Power supply will also affect the rate of your computer. Basic parts of computer case are mother board, CPU, main board, tower and CPU cooler.
Output device refers to device connected to motherboard. Output devices will increase the speed of your computer. Computer has different types of output devices such as printers, hard disk, graphics card, sound card, scanners and so on. Before purchasing computer, you must check the output devices to make sure that they will work properly in your desktop computers. Before buying your computer, you must read about your computer models.