A computer is a combination of hardware and software that processes data into information. Computer hardware refers to the physical components like monitors, keyboards, and speakers. Computer software includes programs like Word and Excel that tell the computer what to do. A computer takes in data as input, processes it, and produces output. It has four main functional components - input, processing, output, and storage. Computers are now used in many fields like banking, education, hospitals and more due to their speed, large storage capacity, accuracy, reliability, and versatility. However, computers lack decision-making ability and have zero intelligence of their own.

1. Computer System

2. What Is A Computer?
The word Computer is derive from
‘compute’, which means to calculate.
A computer is a group of electronic
devices which is used to process data.
A computer is a combination of
HARDWARE and SOFTWARE which
transform DATA into INFORMATION

3. Computer Hardware
Computer Hardware refers to the physical
part of the computer that ones that you
can touch for example :-
• Monitor
• Keyboard and Mouse
• Speakers

4. Computer Software
Computer software refers to the set
of instructions(programs) that tell the
computer what to do.
• Examples:-
MS- Word
MS- Excel

5. Data
Unprocessed raw facts and figures are
called data. For example : - a
name(ROHAN), some marks(72.5%), an
year(2015) etc are data.

6. Information
The processed data that is meaningful
is called information.
Above data can be converted as
“Rohan, who passed in 2015, got 72.5%
marks.”

7. FUNCTIONING OF
COMPUTER
• A computer takes an input, carries
out a process upon it, and produces
the output
• Ex:-
• Input 2,3
• Process 2+3=5
• Output 5

8. Functional components of
Computer
A computer mainly has four components
• Input-Accepts data
• Processing-Process Data
• Output-Produces result/output
• Storage-stores result
Input unit Central processing unit(CPU) Output Unit
Main Memory
Memory is the storage brain of computer which holds the
data during processing

9. Applications of Computers
Now a days computers are being used in nearly
every field of life. For ex:-
• Banks
• Education
• Hospitals
• Entertainment
• Schools / Colleges

10. Strengths of computer
1. SPEED
2. HIGH STORAGE CAPACITY
3. ACCURACY - Error free results.
4. RELIABILITY - can work for long hours
without boredom and tiredness.
5. VERSATILITY-can perform a variety of
tasks(many kind of tasks).

11. Weakness of computer
1. Lack of decision making Power –
computers can’t decide of their own
2. IQ Zero-Computer is a dumb
machine with zero IQ. They need to
told each and every step by human.