About Computer
Computer is a electronic machine
Computer is a capable of storing and processing large amount of information of dadt
Computer can do many types of work
System unit
The case that contains the CPU , memory , the power supply , disk drives and all other hardware-such as a modem-that are in an interanl format.
Monitor
An output device that lets you see your work as you go.
Keyboard
The principal input device ; used to type instructions into the computer.
Mouse
A pointing device used to make on- screen selections.
Floppy disk drives
Reads from and writes to floppy disks.
HARD DRIVE
Located inside the system unit and used to store programs and most data.
CD/DVD Drive
Reads CD/DVD biscs
CD/DVD discs
Commonly used to deliver program and St
store large multimedia files
Floppy disks
Used for storing small amounts of data for backup data to another PC
FLASH MEMORY Card Reader
Used to read flash memory Card
PRINTER
Produces printed copies of computer output
SPEAKER
Used to produce audio output
MICROPHONE
Used to get spoken input
Computer always need a program to perform any task
PROGRAM
A program is a set of instructions written in a particular language which direct the computer to perform a certain task. A program is normally executed sequentially but the sequence of its execution may be altered by using some control instructions. A common technique to know the program execution flow is by using flow chart.
FLOW Chart
A flow chart is a type of diagram that represents an algorithm or
process , showing the steps as boxes of various kinds and their order by connecting them with arrows. Flow charts consist of symbols and flow lines.
SOME IMPORTANT SYMBOLS :-
START / END
Terminators
PROCESS BOX
Input/output box
a>b no
Yes
Decision box
START
Read n
M = 1
F = 1
------>
| F=F*m
| < - Is
M =M+ 1 <No-M=N?
YES
Print f
End
A B
Connectors ______>|
|
FLOW Chart
__________________________________________
More information about computer in next post
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