It serves the same purpose as a mouse but is designed with a moveable ball on the top, which can be rolled in any direction. A trackball is an input device used to enter motion data into computers or other electronic devices. By moving your mouse to a location in a document, on a digital photo or over a choice of music, you can click the left mouse button to place the cursor. The scrolling wheel is used to move the view of the screen up or down. The right mouse button can be selected and will often pop up a window of choices. The left mouse acts as an ‘enter’ button. A mouse is used to input data by sending a signal to the computer, based on hovering the cursor and selecting with the left mouse button. It helps to enter data on the computer. A Keyboard is the most fundamental input device for any computer system. It will control devices such as a computer or information appliance.Įxamples: keyboards, mice, scanners, digital cameras and joysticks. In computing, an input device is a peripheral (piece of computer hardware equipment) used to provide data and control signals to an information processing system. It also includes all the parts inside the computer case, such as the hard disk drive, motherboard, video card, and many others. Computer hardware is what you can physically touch includes the computer case, monitor, keyboard, and mouse. Storage devices, such as a hard drive or flash driveĬomputer Knowledge – Main Parts of Computer. Output devices, such as a monitor and a printer. Input devices, such as a mouse and a keyboard. There are many peripheral devices, but they fall into three general categories:. The core elements of a computer are the central processing unit, power supply, motherboard and the computer case that contains those three components. A computer peripheral is a device that connects to a computer but is not part of the core computer architecture. Examples are a mouse, keyboard, monitor, printer and scanner. The peripheral device connects to a computer system to add functionality. Instead of keyboards, handheld computers have touch screens that you use with your finger. Some have advanced capabilities, such as making telephone calls or accessing the Internet. These are useful for scheduling appointments, storing addresses and phone numbers, and playing games. Handheld computers, also known as personal digital assistants (PDAs), are battery-power computers small enough to carry almost anywhere. The screen folds down onto the keyboard when not in use. Unlike desktops, laptops combine the CPU, screen, and keyboard in a single case. Laptops can operate on batteries, so you can take them anywhere. The Laptops are lightweight mobile PCs with a thin screen. Other components, such as the monitor, mouse, and keyboard, connect to the system unit. 
The main component, called the system unit, is usually a rectangular case that sits on or underneath a desk.They are typically larger and more powerful than other types of personal computers.
Desktop computers design is made for use at a desk or table.These computers are built to perform a few number of tasks. There are tiny computers embedded in cars, TVs, stereo systems, calculators, and appliances.
There are supercomputers, very large computers with thousands of microprocessors that perform extremely complex calculations. Monitor Process the information in the form of output.Ĭomputers range in size and capability.Central Processing Unit which controls the processing.Input devices allow data and commands to the computer (Mouse, Keyboard etc.).However, all computers have several parts in common:.A computer is a device that can receive process and store data.
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