This document provides an overview of electronic data processing and the components of a computer system. It discusses that electronic data processing (EDP) is the process of performing arithmetic and logical operations with a computer. The main components of a computer system are the hardware, which includes physical parts like the CPU, memory, and storage devices, and the software, which are the set of instructions used to solve problems. It then describes the different types of hardware units (input, output, system), components inside the CPU, computer buses, computer storage, ports, and serial/parallel ports.

1. ‫بسم‬
‫هللا‬
‫الرحمن‬
‫الرحيم‬

2. Produced By
Inam Ur Rehman &
Mujeeb Ahmad
PRODUCED
TO
Waris Ali Malik

3. What is electronic data
processing?
Information
Processing
Data

4. Electronic data processing
Definition
EDP stands for Electronic Data
Processing. It is the process
of performing arithmetic and
logical operations with the
help of computer is called EDP.

5. What are the components of a
Computer system?
Computer system
The hardware &
software used as a
unit to process data
is called Computer
System.
“Components”:
Computer
hardware
Computer
software

6. Computer Hardware
The physical parts of
the computer are called
Hardware.
“Components”:
CPU
Output devices such
as Printer, monitor
etc.
Storage devices
such as disc drive,
hard drive etc.
Memory chips (Ram,
rom)

7. Different types of hardware
units
Input
unit
Output
unit
System
unit
Input Unit
Output unit
System unit

8.  Input unit
The input unit of a
computer system
consists of input
devices. Theses
devices are used to
input data into the
computer.
Input devices are:
Keyboard, mouse,
Microphone and
scanner.

9.  Output
unit
The output unit
of a computer
system consists
of output
devices. The
output devices
are used to
display
information.
Output devices
are:

10. System unit
System unit is a cause that
contains different electronic
components of the computer used
to process data. The casing is
available in two shapes.
 Vertical shape (tower casing)
 Horizontal shape (desktop
casing)
System units are motherboard,
processor, memory, hard disk and
other electronic components.

11. Computer
software
A set of
instructions
given to the
computer to solve
a problem is
called software.
It is also called
program.
“Types”:
System software

12. System software & Application
software
oSystem Software
(instructions given to
the system for solving
problem of the system or
computer)
Further two types:
Operating system (MS
Windows)
Utility Programs
(Antivirus)
oApplication Software
(Set of instructions
given to the computer for
solving problem of the
user or programmer)

13. Basic organization of
computer
The main three
(3) units in the
organization of
computer system
are as follows:
Central
processing unit
(CPU)
Memory unit
Input/output
CPU
Memory
Unit
Input /
Output
Unit

14. Central processing
unit
CPU stand
for
Central
Processin
g Unit.
There are
two
types:
ALU and

15. •Register
A register is a
small high-speed
memory inside
CPU. The CPU
contains a number
of registers.
Registers are
used to store
information being

16. •Computer
bus
A computer system
consists of different
devices. The devices are
connected together by a
communications channel
called bus. The bus is
used to connect the
following units:
CPU
• Control unit
• Arithmetic & logical
unit
Main memory(ram,rom)

17. Types of system
buses
There are three (3) types of system
buses are as follows:
 Data bus (it is used to
transfer data b/w
different components of
the computer)
 Address bus (it is used
to connect the CPU with
main memory to identify
addresses in the main
memory)
 Control bus (it is used
to carry control
information from
control unit to other
Data Bus
• CPU (ALU,
Registers and
Controls)
Address
Bus
• Input and
Output
Control
Bus
• Memory

18. Computer Storage & its
types
The unit that is used to
store programs and data
is known as Computer
Storage.
Types:
Main storage ( it is
directly accessible by
CPU. e.g. Ram )
Secondary storage ( it is
used to store data &
programs permanently.

19. Ports
A port is an interface
or connection point
through which
peripheral devices
(input & output
devices) connected to
the computer. A computer
has different type of ports to
connect different devices. The
type of port operates at a certain
speed. The speed can be
measured in kbps, mbps or
gbps.

20. Types of
ports
Serial
Port
Parallel
Port
USB Port
Different types
of ports are as
follows:
Serial ports
Parallel ports
Usb ports

21. • Serial ports
A type of port
that transmits
one bit at a
time is called
serial port. It
is often
referred to as
communications
(com) port.

22. • Parallel ports
A type of port
that transmits
many bits at a
time is called
parallel port. It
is often referred
to as line printer
(Lpt) ports.

23. •Usb ports
Usb stands for
universal serial
bus. it is a plug-
&-play hardware
interface. It is
used to connect
devices such as
keyboard, mouse,
digital camera,
scanner and

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