Computer Hardware & Their Functions
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This document discusses various computer hardware and software components and their functions, as well as how people use computers in different fields. It describes input devices like keyboards, mice, webcams, scanners, and microphones. Output devices covered include printers, monitors, speakers, headphones, and projectors. Processing devices mentioned are the CPU, motherboard, processor, network card, and video card. Storage devices include optical discs, memory cards, floppy disks, and hard disks. Application software discussed includes Adobe Photoshop, MS PowerPoint, Movie Maker, MS Word, and Notepad. System software covered are operating systems like Mac OS, Linux, Android, and Windows. The document also outlines how computers are
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Computer Hardware & Their Functions
- 2. INPUT DEVICES KEYBOARD The keyboard is one of the primary ways we communicate with the computer and enter data
- 3. MOUSE The mouse is a peripheral that is known as a pointing device. It lets you point to objects on the screen, click on them, and move them.
- 4. WEBCAM A webcam – short for ‘web camera’ – is a digital camera that’s connected to a computer.
- 5. SCANNER An optical device that reads a printed page or transparency and converts it into a graphics image for the computer.
- 6. MICROPHONE A device that converts sound waves into analogous electrical waves. Usually called a "mic" or "mike," it contains a flexible diaphragm composed of film or foil that vibrates as it makes contact with the sound.
- 7. OUTPUT DEVICES PRINTER Printer is a machine used to transfer text or images to paper, or a person or company whose job it is to produce text or images on paper.
- 8. MONITOR The monitor works with a video card, located inside the computer case, to display images and text on the screen.
- 9. SPEAKER Speaker is defined as an electrical device used to make sound or music louder.
- 10. HEADPHONE A listening device placed or worn in the ear, usually sold in pairs
- 11. PROJECTOR An optical device that projects a beam of light, especially one used to project an image (moving images) onto a screen.
- 12. PROCESS DEVICES CENTRAL PROCESSING UNIT CPU – Central Processing Unit The central computational and control unit of a computer system, the CPU controls the interpretation and execution of instructions. The CPU contains the arithmetic logic unit (ALU), whichperforms mathematical calculations, and the control unit, which retrieves instructionsfrom memory, accepts calculations from the ALU, and executesthe instructions. The CPU often is contained on a single silicon chip, known as a microprocessor. CPU commonly is interchangeable with microprocessor and processor.
- 13. MOTHERBOARD a printed circuit board containing the principal components of a computer or other device, with connectors into which other circuit boards can be slotted.
- 14. PROCESSOR A microprocessor is a computer processor that incorporates the functions of a computer's central processing unit (CPU) on a single integrated circuit (IC), or at most a few integrated circuits.
- 15. NETWORK CARD a device that can be slotted into a computer to allow the use of audio components for multimedia applications.
- 16. VIDEO CARD A printed circuit board controlling output to a display screen.
- 17. STORAGE DEVICES OPTICAL DISC DISC - a thin, flat, circular plate coated with ferromagnetic particles, on which computer data can be stored.
- 18. MEMORY CARD MEMORY CARD - A removable module that contains non-volatile flash memory chips used for storage in digital cameras and mobile devices. The major card types are SD Cards, Memory Sticks and CompactFlash; the SD Card family being the most popular.
- 19. FLOPPY DISK Floppy Disk - A flexible plastic disk coated with magnetic material and covered by a protective jacket, used for storing data magnetically.
- 20. An optical device that projects a beam of light, especially one used to project an image (moving images) onto a screen.
- 21. HARD DISK - The primary computer storage medium, which is made of one or more aluminum or glass platters, coated with a ferromagnetic material. Although the terms "hard disk" and "hard drive" are used synonymously; technically, the disk spins inside the drive.
- 23. APPLICATION SOFTWARE ADOBE PHOTOSHOP - An image editing software developed and manufactured by Adobe Systems Inc. Photoshop. The software allows users to manipulate, crop, resize, and correct color on digital photos.
- 24. MS Powerpoint - a software package designed to create electronic presentations consisting of a series of separate pages or slides.
- 25. MOVIE MAKER - allows you to quickly build a personalized movie that incorporates video, still images, background music, and narration.
- 26. MS WORD - Word files are commonly used as the format for sending text documents via e- mail because almost every user with a computer can read a Word document by using the Word application, a Word viewer or a word processor that imports the Word format.
- 27. NOTEPAD - Notepad is a generic text editor included with all versions of Microsoft Windows that allows you to open and read plaintext files.
- 28. SYSTEM SOFTWARE System software (systems software) is computer software designed to operate and control the computer hardware and to provide a platform for running application software.
- 29. Mac OS is the computer operating system for Apple Computer's Macintosh line of personal computers and workstations.
- 30. The Linux open source operating system, or Linux OS, is a freely distributable, cross- platformoperating system based on Unix that can be installed on PCs, laptops, netbooks, mobile and tablet devices, video game consoles, servers, supercomputers and more.
- 31. System software (systems software) is computer software designed to operate and control the computer hardware and to provide a platform for running application software.
- 32. Android is a mobile operating system (OS) currently developed by Google, based on the Linux kernel and designed primarily for touchscreen mobile devices such as smartphones and tablets.
- 33. GAMES SOFTWARE Game software these are programs that are used to entertain the user through games.
- 39. PEOPLE USING COMPUTER FOR BUSINESS The use of computer technology in business provides many facilities. Businessmen are using computers to interact with their customers anywhere in the world. Many business tasks are performed more quickly and efficiently. Computers also help them to reduce the overall cost of their business. Receptionist
- 40. Cashier
- 41. Teller
- 44. PEOPLE USING COMPUTER FOR ENTERTAINMENT Computers are also playing very important role for the entertainment of human beings. Nowadays, computer can be used to watch television programs on the Internet. People can also watch movies, listen music, and play games on the computer. Many computer games and other entertainment materials of different kinds are available on the Internet. Games
- 46. BROADCASTING
- 47. INTERNET SURFING
- 48. PEOPLE USING COMPUTER FOR SCIENCE DOCTORS Computers are now essential tools in every branch of science, but we know remarkably little about how—or how well— scientists use them. Nearly every area of the medical field uses computers. For example, computers are used for maintaining patient history & other records. They are also used for patient monitoring and diagnosis of diseases etc.
- 49. MEDICAL TESTING
- 50. SCIENTIST
- 51. BIOLOGIST