Hardware

                                                        Definitions

Computer hardware is the collection of physical elements that constitutes a computer system. Computer hardware refers to the physical parts or components of a computer such as the monitor, mouse, keyboard, computer data storage, hard drive disk (HDD), system unit (graphic cards, sound cards, memory, motherboard and chips), etc. all of which are physical objects that can be touched. In contrast, software is instructions that can be stored and run by hardware.

Types

• Monitor: is a free open source software that monitors temperature sensors, fan speeds, voltages, load and clock speeds of a computer.
• Motherboard: is the main printed circuit board (PCB) found in computers and other expandable systems.
• CPU(Central Processing Units): is the hardware within a computer that carries out the instructions of a computer program by performing the basic arithmetical, logical, and input/output operations of the system. 
• RAM(Random Acess Memory): is a form of computer data storage. A random-access device allows stored data to be accessed directly in any random order.
• Expansion Cards: is a printed circuit board that can be inserted into an electrical connector, or expansion sloton a computer motherboard, backplane or riser card to add functionality to a computer system via the expansion bus.
• Power Supply: is a device that supplies electric power to an electrical load. The term is most commonly applied to electric power converters that convert one form of electrical energy to another, though it may also refer to devices that convert another form of energy (mechanical, chemical, solar) to electrical energy.
• Optical Disk Drive: is a disk drive that uses laser light or electromagnetic waves within or near the visible light spectrum as part of the process of reading or writing data to or from optical discs. 
• Hard Disk Drive: is a data storage device used for storing and retrieving digital information using rapidly rotating disks (platters) coated with magnetic material. 
• Keyboard: is a typewriter-style device, which uses an arrangement of buttons or keys, to act as mechanical levers or electronic switches.
• Mouse: is a pointing device that functions by detecting two-dimensionalmotion relative to its supporting surface. 
• Speakers: are speakers external to a computer, that disable the lower fidelity built-in speaker. 
• Printer: is a peripheral which makes a representation of an electronic document on physical media.
• Scanner: is a device that optically scans images, printed text, handwriting, or an object, and converts it to a digital image. 

Photos