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Computer Peripheral devices
Computer peripheral devices are those hardware types which are added to a host computer. The purpose of adding these devices is to enhance the capabilities of the computer. Another description would be that peripheral devices are those devices which are optional in the running of a computer unlike the basic devices like the motherboard, microprocessor, RAM and Hard disk which are totally essential.
Peripheral devices can be added to the computer internally with direct connections to the motherboard via cables, or externally where they are connected to the motherboard via a BUS like a USB or a Universal Serial Bus. Some common external peripheral devices include printers and scanners.
Before the personal computer came into vogue, any device other than the bare essential components such as the motherboard, RAM and CPU were considered to be peripheral devices. In the later stages Keyboards and floppy drives were considered as essentials as well when usage of computers at homes increased.
Certain peripheral devices like CD ROM drives can be placed within the casing and are connected directly to the motherboard through Parallel ATA cables. The motherboards also have certain special slots like the AGP port, PCI ports and PCI express slots. These slots are used for additional peripheral devices like Video cards or sound cards.
The Video cards fit in the AGP port and certain recent versions fit only into the PCI express slot as this port is much faster and efficient with video processing. Sound cards fit into the PCI slot. The PCI slot also serves many other peripheral devices like the Ethernet card, internal modem or the TV Tuner card ... more>>>
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