This document discusses the components and elements of a computer system. It describes how a computer requires input, processing, and output devices to function. The key components are the input devices like a keyboard and mouse, the central processing unit (CPU) which processes data and controls the system, and output devices like a monitor and printer. It also discusses the different elements that make up a computer system, including hardware, software, human users, and firmware. Software is further divided into system software that controls the computer system and application software that is used to solve specific problems.

1. COMPONENTS
OF
COMPUTER
by S Bhardwaj

2. Computer and its components
Computer : Computer itself a combination of
different type of separate electronic device. i.e.
Computer only will be computer if it has INPUT
DEVICE, PROCESS UNIT, and OUTPUT DEVICE.
by S Bhardwaj

3. Input Unit
• This unit contains devices with the help of
which we enter data into computer. This unit
makes link between user and computer. The
input devices translate the information into
the form understandable by computer.
– Keyboard : This is an input device which is used to
input the data into the computer.
– Mouse : This is also an input device which is used
to input the data into the computer.
by S Bhardwaj

4. CPU (Central Processing Unit)
• CPU is considered as the brain of the computer.
CPU performs all types of data processing
operations. It stores data, intermediate results
and instructions (program). It is heart and mind
of the computer without this unit computer
unable to process. It controls the operation of all
parts of computer. CPU itself has following three
components
– ALU(Arithmetic Logic Unit)
– Memory Unit
– Control Unit
by S Bhardwaj

5. Output Unit
• Output unit consists of devices with the help of
which we get the information from computer.
This unit is a link between computer and users.
Output devices translate the computer's output
into the form understandable by users.
– Monitor :
This is an output device which is used to
show the result of the instructions.
– Printers
Printer is an output device, which is used to
print information on paper.
by S Bhardwaj

6. by S Bhardwaj

7. ELEMENTS OR COMPONENTS OF
COMPUTER
The basic elements of computer systems are:
• Hardware,
• Software,
• Human ware
• live ware
• firmware.
by S Bhardwaj

8. • Hardware:
Hardware of a computer involves physical
units of the machine with its electronic and
mechanical functional parts. The layout of
these functional parts is called the architecture
of computer, showing how they are connected
together.
by S Bhardwaj

9. Software:
Software is as vital for effective use of
computer as Hardware. Instructions are to be
given to the computer for doing a particulate job.
A set of such instruction to be executed
sequentially to perform a specific task is called a
program. A collection of programs is referred to
as software.
by S Bhardwaj

10. Human Ware
A group of personnel associated with
various stages, from manufactured to actual use,
of a computer is known as Human ware. These
are actually interfaced between a machine and
the end user. It might include the following
personnel.
by S Bhardwaj

11. Sr. NoType Functions
1
Hardware
Engineers
Design, Fabrication & Maintenance of
Computer System.
2 System Analyst
Studies the problem and prepares the
solution and program specifications.
3 Programmer Writes Computer Programs.
4 Operator Operates the Computer.
by S Bhardwaj

12. Liveware
It was used in the computer industry as
early as 1966 to refer to computer users, often in
humorous contexts, by analogy with hardware
and software. It is a slang term used to denote
people using (attached to) computers, and is
based on the need for a human, or liveware, to
operate the system using hardware and software.
by S Bhardwaj

13. Firmware
Software which available as part of
hardware is called as firmware. Computer can
retrieve and use this software but cannot
modify it easily. These are the programs stored
in ROM chip. This ROM chip is affixed on the
motherboard of the computer. Thus, it is a part
of CPU.
by S Bhardwaj

14. SOFTWARES
• Software is a logical programme to
handle/solve the complex problem.
• Software is as vital for effective use of
computer as Hardware. Instructions are to be
given to the computer for doing a particulate
job. A set of such instruction to be executed
sequentially to perform a specific task is called
a program. A collection of programs is referred
to as software.
by S Bhardwaj

15. by S Bhardwaj

16. Types of Software
Software is a logical programme to handle/solve the complex
problem. Their types are:
• System Software : This is special type of software which is
responsible for handle the whole computer system.
• Application Software : This is special type of software which is
used to solve a particular problem.
• Embedded Software : This type of software embedded with
hardware to do a specific type of job.
• Proprietary Software : In general, this type of software
require to purchase to use that particular software for the
some time or single user as per conditioned by the vendor of
that particular software.
• Open Source Software : This type of software may be freely
available and can not be use in commercially. We can modify,
and use it under the same license.
by S Bhardwaj

17. by S Bhardwaj

18. Computer – Software(In detail)
• Software is a set of programs, which is
designed to perform a well-defined function.
A program is a sequence of instructions
written to solve a particular problem.
There are two types of software
– System Software
– Application Software
by S Bhardwaj

19. SYSTEM SOFTWARE
The system software is collection of programs
designed to operate, control, and extend the
processing capabilities of the computer itself. System
software are generally prepared by computer
manufactures. These software products comprise of
programs written in low-level languages which interact
with the hardware at a very basic level. System
software serves as the interface between hardware
and the end users.
Some examples of system software are Operating
System, Compilers, Interpreter, Assemblers etc.
by S Bhardwaj

20. Features of system software
• Close to system
• Fast in speed
• Difficult to design
• Difficult to understand
• Less interactive
• Smaller in size
• Difficult to manipulate
• Generally written in low-level language
by S Bhardwaj

21. Application Software
• Application software products are designed to
satisfy a particular need of a particular
environment. All software applications prepared
in the computer lab can come under the category
of Application software.
• Application software may consist of a single
program, such as a Microsoft's notepad for
writing and editing simple text. It may also
consist of a collection of programs, often called a
software package, which work together to
accomplish a task, such as a spreadsheet
package.
by S Bhardwaj

22. Examples of Application software
• Payroll Software
• Student Record Software
• Inventory Management Software
• Income Tax Software
• Railways Reservation Software
• Microsoft Office Suite Software
• Microsoft Word
• Microsoft Excel
• Microsoft Powerpoint
by S Bhardwaj

23. Features of Application software
• Close to user
• Easy to design
• More interactive
• Slow in speed
• Generally written in high-level language
• Easy to understand
• Easy to manipulate and use
• Bigger in size and requires large storage space
by S Bhardwaj