Computer- It is a machine that recieves input, stores and manipulates data and provied an output in a useful fornat. http://en.wikipedia.org/wiki/Computer
Hardware: It is a phyical component of a computer system. http://en.wikipedia.org/wiki/Hardware
Software: It is a program that give intsructions to the computer what to do and how to do it. http://en.wikipedia.org/wiki/Computer_software
Program: A computer need programs to function so technically the program is a sequence of intructions written to perform a specified task for a computer. http://en.wikipedia.org/wiki/Computer_program
Input: It is the data/signal recieved by the system. http://en.wikipedia.org/wiki/Input/output
Output: It is the signal or data sent from the input. http://en.wikipedia.org/wiki/Input/output
Storage: It is also called memory. It is computer components and recording media that retain digital data used for computing. http://en.wikipedia.org/wiki/Input
Processing: Is the stage in which the computer process the data which has been sent by the input. http://wiki.answers.com/Q/What_is_computer_processing_cycle
COMPUTER PARTS:
Monitor:
Keyboard:
Hard drive:
Cooling fan:
RAM:
it is a form of computer data storage. Today, it takes the form of integrated circuits that allow stored data to be accessed in any order (that is, at random). "Random" refers to the idea that any piece of data can be returned in a constant time, regardless of its physical location and whether it is related to the previous piece of data.CPU:
it is thea system that carries out instructions of a computer system. Clock: 
it contains the speed of the computer.
Modem: 
A modem modulates outgoing digital signals from a computer or other digital device to analog signals for a conventional copper twisted pair telephone line and demodulates the incoming analog signal and converts it to a digital signal for the digital device.
A modem modulates outgoing digital signals from a computer or other digital device to analog signals for a conventional copper twisted pair telephone line and demodulates the incoming analog signal and converts it to a digital signal for the digital device.Video Card: 
A video card is rectangular in shape with numerous contacts on the bottom of the card and one or more ports on the side for connection to video displays and other devices.
A video card is rectangular in shape with numerous contacts on the bottom of the card and one or more ports on the side for connection to video displays and other devices.Sound Card: 
A sound card is an internal computer component that processes audio files in order to provide high-quality playback through computer speakers. A sound card plays voice as well as music files, and can handle various audio file formats including .wav, .mp3 and .cda to name but a few.
A sound card is an internal computer component that processes audio files in order to provide high-quality playback through computer speakers. A sound card plays voice as well as music files, and can handle various audio file formats including .wav, .mp3 and .cda to name but a few.Motherboard: 
Motherboards tie everything in your computer together.
Motherboards tie everything in your computer together.USB stick: 
it stores data.
it stores data.CD - ROM: 
a type of optical disk capable of storing large amounts of data.
a type of optical disk capable of storing large amounts of data.DVD drive: 
Data on
CD-ROMS and DVD-ROMS cannot be deleted or changed, and new data cannot be
added onto a CD-ROM or DVD-ROMS. DVDs work the same way CDs do, they just
have several layers so they can hold more data than CDs.
CD-ROMS and DVD-ROMS cannot be deleted or changed, and new data cannot be
added onto a CD-ROM or DVD-ROMS. DVDs work the same way CDs do, they just
have several layers so they can hold more data than CDs.
CD drive: 
Data on
CD-ROMS and DVD-ROMS cannot be deleted or changed, and new data cannot be
added onto a CD-ROM or DVD-ROMS. DVDs work the same way CDs do, they just
have several layers so they can hold more data than CDs.
Data onCD-ROMS and DVD-ROMS cannot be deleted or changed, and new data cannot be
added onto a CD-ROM or DVD-ROMS. DVDs work the same way CDs do, they just
have several layers so they can hold more data than CDs.
Floppy disk: 
A floppy disk is a data storage medium that is composed of a disk of thin, flexible ("floppy") magnetic storage medium sealed in a square or rectangular plastic carrier lined with fabric that removes dust particles.
Mouse:
A floppy disk is a data storage medium that is composed of a disk of thin, flexible ("floppy") magnetic storage medium sealed in a square or rectangular plastic carrier lined with fabric that removes dust particles.Mouse:
A hand-operated electronic device that controls the coordinates of a cursor on your computer screen as you move it around on a pad
Printer : A process for reproducing text and image, typically with ink on paper using a printing press.
Power supply : A power supply unit (PSU) is the component that supplies power to the other components in a computer.
SATA : a storage-interface for connecting host bus adapters to mass storage devices such as hard disk drives and optical drives.
PATA : An interface standard for the connection of storage devices such as hard disks, solid-state drives, floppy drives, and CD-ROM drives in computers.
TFT : Thin-film transistor, a technology used in flatscreen displays.
ATI : A supplier of graphics processing units and motherboard chipsets.
Gigabyte: A multiple of the unit byte for digital information storage.
DDR SDRAM : a class of memory integrated circuits used in computers.
Pixel : In digital imaging, a pixel is a single point in a raster image.
PCB : An electronic assembly which is plugged into the main frame assembly of a complex electronic device or which may be used as the principle element of a simple electronic device
CRT : a vacuum tube containing an electron gun (a source of electrons) and a fluorescent screen, with internal or external means to accelerate and deflect the electron beam, used to create images in the form of light emitted from the fluorescent screen.
ROM : Memory whose contents can be accessed and read but cannot be changed
Power supply : A power supply unit (PSU) is the component that supplies power to the other components in a computer.
SATA : a storage-interface for connecting host bus adapters to mass storage devices such as hard disk drives and optical drives.
PATA : An interface standard for the connection of storage devices such as hard disks, solid-state drives, floppy drives, and CD-ROM drives in computers.
TFT : Thin-film transistor, a technology used in flatscreen displays.
ATI : A supplier of graphics processing units and motherboard chipsets.
Gigabyte: A multiple of the unit byte for digital information storage.
DDR SDRAM : a class of memory integrated circuits used in computers.
Pixel : In digital imaging, a pixel is a single point in a raster image.
PCB : An electronic assembly which is plugged into the main frame assembly of a complex electronic device or which may be used as the principle element of a simple electronic device
CRT : a vacuum tube containing an electron gun (a source of electrons) and a fluorescent screen, with internal or external means to accelerate and deflect the electron beam, used to create images in the form of light emitted from the fluorescent screen.
ROM : Memory whose contents can be accessed and read but cannot be changed
