 Hardware

 Monitor  Mouse  Keyboard  Computer Data Storage  Hard Disk Drive  Graphic Cards  Sound Cards  Memory  Motherboard

 A monitor or a display is an electronic visual display for computerselectronic visual displaycomputers  Originally, computer monitors were used for data processing while television receivers were used for entertainment. From the 1980s onwards, computers (and their monitors) have been used for both data processing and entertainment, while televisions have implemented some computer functionality. The common aspect ratio of televisions, and then computer monitors, has also changed from 4:3 to 16:10, to 16:9.data processingtelevision receiversaspect ratio

 In computing, a mouse is a pointing device that detects two- dimensional motion relative to a surface. This motion is typically translated into the motion of a pointer on a display, which allows for fine control of a graphical user interface.computingpointing devicetwo- dimensionalpointerdisplaygraphical user interface  Physically, a mouse consists of an object held in one's hand, with one or more buttons. Mice often also feature other elements, such as touch surfaces and "wheels", which enable additional control and dimensional input.

 In computing, a computer keyboard is a typewriter-style device, which uses an arrangement of buttons or keys, to act as mechanical levers or electronic switches. Following the decline of punch cards and paper tape, interaction via teleprinter-style keyboards became the main input device for computers.computingtypewriter-style devicekeyspunch cardspaper tapeteleprinterinput devicecomputers  A keyboard typically has characters engraved or printed on the keys and each press of a key typically corresponds to a single written symbol. However, to produce some symbols requires pressing and holding several keys simultaneously or in sequence. While most keyboard keys produce letters, numbers or signs (characters), other keys or simultaneous key presses can produce actions or execute computer commands.engravedprintedsymbollettersnumberscharacters  Despite the development of alternative input devices, such as the mouse, touchscreen, pen devices, character recognition and voice recognition, the keyboard remains the most commonly used device for direct (human) input of alphanumeric data into computers.mousetouchscreenpen devicescharacter recognitionvoice recognitionalphanumeric

 Computer data storage, often called storage or memory, is a technology consisting of computer components and recording media used to retain digital data. It is a core function and fundamental component of computers.computerrecording mediadata  The central processing unit (CPU) of a computer is what manipulates data by performing computations. In practice, almost all computers use a storage hierarchy, which puts fast but expensive and small storage options close to the CPU and slower but larger and cheaper options farther away. Often the fast volatile technologies (which lose data when powered off) are referred to as "memory", while slower persistent technologies are referred to as "storage"; however, "memory" is sometimes also used when referring to persistent storage.central processing unitstorage hierarchy

 A hard disk drive (HDD), hard disk, hard drive or fixed disk [b] is a data storage device used for storing and retrieving digital information using one or more rigid ("hard") rapidly rotating disks (platters) coated with magnetic material. The platters are paired with magnetic heads arranged on a moving actuator arm, which read and write data to the platter surfaces. [2] Data is accessed in a random-access manner, meaning that individual blocks of data can be stored or retrieved in any order rather than sequentially. HDDs retain stored data even when powered off. [b]data storage devicedigitalplattersmagnetic headsactuator [2]random-accessblockssequentiallyretain stored data

 A graphics card is a type of display adapter or video card installed within most computing devices to display graphical data with high clarity, color, definition and overall appearance. A graphics card provides high-quality visual display by processing and executing graphical data using advanced graphical techniques, features and functions.  A graphics card is also known as a graphics adapter, graphics controller, graphics accelerator card or graphics board.

 A sound card (also known as an audio card) is an internal computer expansion card that facilitates economical input and output of audio signals to and from a computer under control of computer programs. The termsound card is also applied to external audio interfaces that use software to generate sound, as opposed to using hardware inside the PC. Typical uses of sound cards include providing the audio component for multimedia applications such as music composition, editing video or audio, presentation, education and entertainment (games) and video projection.computerexpansion cardaudio signals  Sound functionality can also be integrated onto the motherboard, using components similar to plug-in cards. The best plug-in cards, which use better and more expensive components, can achieve higher quality than integrated sound. The integrated sound system is often still referred to as a "sound card". Sound processing hardware is also present on modern video cards with HDMI to output sound along with the video using that connector, previously they used a SPDIF connection to the motherboard or sound card.motherboard

 In computing, memory refers to the computer hardware devices used to store information for immediate use in a computer; it is synonomous with the term "primary storage". Computer memory operates at a high speed, for example random-access memory (RAM), as a distinction from storage that provides slow-to-access program and data storage but offers higher capacities. If needed, contents of the computer memory can be transferred to secondary storage, through a memory management technique called "virtual memory". An archaic synonym for memory is store. [1]computingcomputer hardwarecomputerprimary storagerandom-access memorystorageprogram and data storagesecondary storagevirtual memory [1]

 A Motherboard (sometimes alternatively known as the mainboard, system board, planar board or logic board, [1] ) is the main printed circuit board (PCB) found in computers and other expandable systems. It holds and allows communication between many of the crucial electronic components of a system, such as the central processing unit (CPU) and memory, and provides connectors for other peripherals. Unlike abackplane, a motherboard contains significant sub-systems such as the processor and other components. [1]printed circuit boardcomputerscentral processing unitmemoryperipheralsbackplane