Introduction of Computer
Computer
is an electronic device which accept input, store it, process on it and give
desire output.
A
personal computer (PC) is a computing device made up of many distinct electronic
components that all function together in order to accomplish some useful task,
such as adding up the numbers in a spreadsheet or helping you write a letter.
Functions of a PC
Ø Accepts data input from user
Ø Stores data
Ø Processes the input using
instructions
Ø Displays processed data on output
devices
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Input Devices
Used
to enter data in computer
Different
types are:
ØKeyboard
ØPointing
Devices
ØScanner
ØDigital
Camera
Output Devices
Ø Used
to display or produce processed data
Ø Monitors
and printers used to display output
Ø Different types of
output devices are:
ØDisplay
System
ØDisplay
Card
ØSound
Card
ØPrinters
ØFax
Storage Devices
Used to
store data in the computers
Different
types of storage devices are:
ØMagnetic
Devices – Floppy, Zip drive
ØOptical
devices – CD, DVD
ØSolid-State
Storage devices – Flash memory, memory cards
ØDigital
Audio Tape
Processing Devices
Computer
main function is to process data
Various
types of processing devices are:
ØMicroprocessor
ØChipset
ØBIOS
Communication Devices
Establish
communication between computer using different cables, interfaces and wireless
devices
Various
types of communication devices are:
ØInterfaces
– ATA, SCSI
ØI/O
Ports and Cables – Serial, Parallel, USB
ØLAN
Card
ØModem
ØNetwork
Cables – STP, UTP, Fiber Optic Cable
Infrastructure Devices
Refers
to main components and foundation on which computer functions
All the
peripheral devices of the computer are attached
Various
types of components are:
ØSystem
Case
ØPower
Supply
ØMotherboard
ØExpansion
Boards
