System+Unit

=// Hard drive- //=

=**//Major memory storage in the computer.//**=



= = Random access memory -Short term temporary memory. It remembers what you are working on.**
 * //RAM//

=//CPU//= is Central Processing Unit- the brain of the [|computer]

=//Video card//= You can get a video card for $291.99 A video card is a circuit board in a computer system. It is designed to generate output for the system's video display screen.

=//Motherboard//= a circuit board that connects the ciruits of the computer

=//Sound Card//= -A computer circut board that allows a personal computer to receive sound in digital form and reprudices it through speakers. One Fact Is-Before the invention of a soud card, a PC could make one sound (a beep).Now the computer has all different music like on games.

= = =//CD drive//= a drive that reads a compact disc and that is connected to an audio system A Compact Disc drive, used to read data CDs (also called CD-ROMs). A CD can store up to 650 Megabytes (millions of characters)

=//Fan//=

Computer Fan -A fan located inside a computer case generally attached to the front and/or back of the computer that helps bring air into the case and also take hot air out of the case. The average cost of a computer fan is about $12.99. The most expensive fan I found was $20.99 and the cheapest one was $5.99. = = = = =//__Heat Sync__//=

the simplest heat sync is aluminum that uses fins for maximum cooling the average cost for a heat sync is $10-$15.

=**//Power Source//**=

The definition of a power source is the battery that runs the computer.** = =
 * The average cost of a power source is $99.99.