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This picture is a motherboard with all parts that helps bring all our computers that we use daily in the world today together. The Mother board is the uniting element among all the chips and circuitry that make up a computer. Devices connect with each other through the motherboards circuits which give them their power. In the following paragraphs i am going to name common parts of the motherboard:

Memory slots are current slots support DDR and DDR2 RAM, which is now the more popular type of memory.
Power Supply Connections are older boards have only one 20-pin connector.
IDE Connector are connects to two EIDE/ATA hard drives and optical drives using the older parallel connection.
CPU Socket determines what kind of raicroprocessor, or CPU the motherboard uses.
The North Bridge and South Bridge together form the computer’s chip set, secondary only to the processor in determining the performance and capabilities of a PC.
South Bridge is two-digit display that provides codes used in troublshooting a disable PC.
Battery keeps the BIOS chip drive.
Floppy Disk Connections only communicated with a floppy drive, that works your floppy disk.
Ports is an input or output panel that holds the miscellaneous ports on the back and front of the PC that are used for communicating with external devices.
Expansion Slots are additional capabilities that can be added to the computer by plugging a circuit board called an expansion card in one of the slots.
USB is the slots in which you can connect keyboards, mouses, and your USB drive ( holds files and documents)