Computer Hardware Basics Explained with Parts

Computer Hardware 

computer is an high-speed electronic computing and data processing device which takes inputs processes it and produces the output accordingly it also store information in memory this diagram shows basic operation flow on computer that is input processing and output common characteristics of a computer computer understands machine language that can't be understandable by human computer recognizes values in the forms of zeros or ones accuracy repetitive task and tirelessness work computer hardware is physical components of a computer system it is abbreviated as computer hw or hw in short computer parts which can physically touch 

four categories input devices for raw data input processing devices to process raw data instructions into information output devices to disseminate data and information storage devices for data and information retention input devices keyboard it is the most popular and commonly used input device it is just like a typewriter with additional keys for special purposes typing keys alphabet keys a to z and number keys 0 to 9. function keys 12 function keys used for specific purposes control keys these are cursor and screen control keys 

Computer Hardware 

example arrow keys page up page down control alternate escape home end insert and delete operator and special character keys special purpose keys enter backspace num lock caps lock shift space bar tab scroll lock sleep and print screen numeric keypad quick and easy reference keys numbers arrow keys operator keys etc mouse popular pointing selection and cursor control device microphone it is used to recording sound then stored in the digital form mainly used in multimedia works joystick is also a pointing device which is used to move the cursor position on a screen it is mainly used in games light pen is a pointing device similar to a pen 

Computer Hardware 

used to select a menu item or draw pictures on the screen scanner it works like a photocopy or xerox machine it transfers information available on paper into digital format and stores it in computer memory barcode reader it is used for reading barcoded data data in the form of light and dark lines barcoded data is generally used in labeling items numbering the books etc optical character reader ocr it is used to scan printed text optically and converts them into readable text and store it in a computer memory magnetic kink card reader micr micro is used in banks where to read bank's code number and check number are printed on the checks with a special type of ink optical mark reader omr it is a optical scanner used to recognize the type of mark made by pen or pencil it is specially used for checking the answer sheets of examinations having