introduction to computing Lecture no

1. Rules
 No mobile phones
 Arrive on time!
 No disruption!!!! No Misconduct!!!!
 80% Attendance
 REMEMBER: Your first priority must be your studies

2. Overview
 Computer is a Latin word which mean to compute or in other words we can say that it’s
a machine which can perform computations millions and billions time faster than a
human
 Computer are integral part of our everyday existence.
 Computer is an electronic device that receives input , stores or process the
input as per user instructions and provides output in desired format.

3. Input - Process -Output Model
Simple Workflow of Computer

4. Input -process -Output model
 Computer input is called data
 Output obtained after processing data, based on user's instructions is called
information.
 Figures which can be processed using arithmetic and logical operations to
obtained information are called data.
 Processes that can be applied to data are two types
 Arithmetic operations
 Logical operations

5. Input - Process -output model
Block diagram
Input Unit
Arithmetic
logic unit
Control
unit
Memory
unit
Output unit

6. Input - Process -output model
 The basic parts of computer are .
1. Input Unit: Devices used to input data and instructions.
2. Arithmetic Logic Unit: All arithmetic operations and logical operations take place.
3. Control Unit: all devices or parts of computer interact through the control unit.
4. Memory : All input data , instructions and data interim to the processes are stored in
the memory .
5. Output Unit: Devices used to provide information to the user in descried format.

7. Input - Process -output model
 Memory is of Two Types
Primary Memory
Secondary Memory
 Control unit , arithmetic logic unit and memory are together called the central processing unit
or CPU.
 Computer devices that we can see and touch are the hardware components of a computer .(e.g
keyboard , mouse )
 Set of instructions or programs that make the computer function using these hardware parts
are called software .