Mains Parts of computer- Hardware software

Mains Parts of computer- Hardware software

Hardware – Computer hardware is what you can physically touch includes the computer case, monitor, keyboard, and mouse. It also includes all the parts inside the computer case, such as the hard disk drive, motherboard, video card, and many others.

Input Devices– 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 such as a computer or information appliance.

Examples: keyboards, mice, scanners, digital cameras and joysticks.

Keyboard – A Keyboard is the most fundamental input device for any computer system. It helps to enter data in computer.

Mouse – 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. The left mouse acts as a ‘enter’ button. The right mouse button can be selected and will often pop up a window of choices. The scrolling wheel is used to move the view of the screen up or down. 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.

Trackballs – A trackball is an input device used to enter motion data into computers or other electronic devices. It serves the same purpose as a mouse, but is designed with a movable ball on the top, which can be rolled in any direction. Instead of moving the whole device, you simply roll the movable ball on top of the trackball unit with your hand to generate motion input.

Barcode reader – A barcode reader (or barcode scanner) is an electronic device that can read and output printed barcodes to a computer. Like a flatbed scanner, it consists of a light source, a lens and a light sensor translating optical impulses into electrical ones.

Digital camera – a camera which produces digital images that can be stored in a computer and displayed on screen.

Gamepad – a handheld controller for video games.

Joystick – a lever that can be moved in several directions to control the movement of an image on a computer or similar display screen. It mainly used in playing games.

Microphone – an instrument for converting sound waves into electrical energy variations which may then be amplified, transmitted, or recorded.

Scanner – a device that scans documents and converts them into digital data.

Webcam – a video camera connected to a computer, allowing its images to be seen by Internet users.

Optical character recognition (OCR) – is the mechanical or electronic conversion of images of typed, handwritten or printed text into machine-encoded text.

Digitizer – It converts analog information into digital form.

Optical Mark reading (OMR) – Optical Mark Readers reads pencil or pen marks made in pre-defined positions on paper forms as responses to questions or tick list prompts.

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