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1. Computer hardware is the physical parts or components of a computer, such as the monitor, mouse, keyboard, computer data storage, hard disk drive (HDD), system unit (graphic cards, sound cards, memory, motherboard and chips), and so on, all of which are physical objects that can be touched (that is, they are tangible).

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Computer software or simply software is any set of machine-readable instructions that directs a computer's processor to perform specific operations. Computer software contrasts with computer hardware, which is the physical component of computers. Computer hardware and software require each other and neither can be realistically used without the other. Using a musical analogy, hardware is like a musical instrument and software is like the notes played on that instrument.

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There are different types of computer system

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There are different types of computer system

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How internal  hardware components comunicate

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How internal  hardware components comunicate

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In computer architecture, a bus (related to the Latin omnibus, meaning "for all") is a communication system that transfers data between components inside a computer, or between computers. This expression covers all related hardware components (wire, optical fiber, etc.) and software, including communication protocols.[1]

Early computer buses were parallel electrical wires with multiple connections, but the term is now used for any physical arrangement that provides the same logical functionality as a parallel electrical bus. Modern computer buses can use both parallel and bit serial connections, and can be wired in either a multi drop (electrical parallel) or daisy chain topology, or connected by switched hubs, as in the case of USB.

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1. An embedded system is a computer that has been built to solve only a few very specific problems and is not easily changed. In contrast, a general-purpose computer can do many different jobs, and can be changed at any time with new programs for new jobs.

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1. A printed circuit board (PCB) mechanically supports and electrically connects electronic components using conductive tracks, pads and other features etched from copper sheets laminated onto a non-conductive substrate. PCBs can be single sided (one copper layer), double sided (two copper layers) or multi-layer.

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silicon chip - electronic equipment consisting of a small crystal of a silicon semiconductor fabricated to carry out a number of electronic functions in an integrated circu

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A memory card or flash card is an electronic flash memory data storage device used for storing digital information. These are commonly used in many electronic devices, including digital cameras, mobile phones,laptop computers, MP3 players and video game consoles, Tablets. Most of these can be diminutive, re-recordable, and can retain data without power.

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The graphics components are the part of your computer that control and enhance how graphics (pictures, videos, programs, animation, 3D) are displayed on your computer screen.

Often, the graphics components are on a separate card that plugs into a slot on the motherboard, which is the main part of the computer. That's why the graphics components are commonly called the graphics card. Sometimes the graphics card components are build directly into the motherboard.

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A video card (also called a video adapter, display card, graphics card, graphics board, display adapter, graphics adapter or frame buffer[1] and sometimes preceded by the word discrete or dedicated to emphasize the distinction between this implementation and integrated graphics) is an expansion card which generates a feed of output images to a display (such as a computer monitor). Within the industry, video cards are sometimes called graphics add-in-boards, abbreviated as AIBs,[2] with the word "graphics" usually omitted.

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Learn how drawing tablets work and what kind of features and specs to look for when buying a tablet online. ► Subscribe: http://bit.ly/1BscNfa ► Updated version of this video for 2015: https://www.youtube.com/watch?v=VzOAcAsZIaw Digital Artist, Aaron Rutten compares the various models of graphics tablets, describes the features and gives you first-hand advice from his experience as a professional artist to help you make the right choice when buying your own tablet.

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http://en.wikipedia.org/wiki/Computer_simulation

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

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mputer architecture is a set of disciplines that describes the functionality, the organization and the implementation of computer systems; that is, it defines the capabilities of a computer and its programming model in an abstract way, and how the internal organization of the system is designed and implemented to meet the specified capabilities.[2][3] Computer architecture involves many aspects, includinginstruction set architecture design, microarchitecture design, logic design, and implementation.[4] Some fashionable (2011) computer architectures include cluster computing and non-uniform memory access.

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A central processing unit (CPU) is the electronic circuitry within a computer that carries out the instructions of a computer program by performing the basic arithmetic, logical, control and input/output (I/O) operations specified by the instructions. The term has been used in the computer industry at least since the early 1960s.[1] Traditionally, the term "CPU" refers to aprocessor and its control unit (CU), distinguishing these core elements of a computer from external components such asmain memory and I/O circuitry.[2]

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Computer Simulation Visualizes History of the Universe

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The simulation, called the Illustris, begins just 12 million years after the Big Bang and illustrates the formation of stars, heavy elements, galaxies, exploding super novae and dark matter over 14 billion years. (Courtesy: Illustris Collective).

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http://en.wikipedia.org/wiki/Computer_simulation'

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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 term sound 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.http://en.wikipedia.org/wiki/Computer_simulation