Post on 09-Apr-2018
8/8/2019 Intro to Comp Concepts (2)
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What is Computer
A programmable electronic device, which inputs data,
processes it, gives information according to theinstructions provided.
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DataComputer System
PROCESSINGInformation
Example:
Marks of 60 students : Data (Input)
To find the highest scorer : Process
The name of the topper : Information (Output)
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Need For Computer LiteracyIn most places of business, a computer is standard.
Bank - to look up account information. Library - card catalog to use a computerized database. Job Hunt -It will help in getting a job and it will help you
advance in your career. Computer literacy does not mean you need to know how touse every single piece of software.
It does not mean you need to know how to write programs ornetwork of computers.
You just need to know some basics how to save and opena file, how to use a word processing program, and how tosend and receive email.
Having some sort of level of comfort around computers ratherthan a look of fear.
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Application of ComputerSystem
Today computer is used almost in every field.
For example. It is used in
Banks
Railways
Hospitals
Airports
Schools/Collegesand many more..
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Components of ComputerSystem
What is the difference between the computer andcomputer system?
Computer refers to the actual physical electronic device. Whereas thecomputer system includes following:
1. Hardware any physical component which wecan touch/see.
2. Software data contained in the hardware,similar to songs in audio cassette .
3. Live ware (user) the computer operator
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Computer Hardware
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Computer Hardware
We can classify the computer hardware as:
1. Input Devices those devices which are used for enteringdata to the computer. Example: Keyboard, Mouse, Scanner, Webcamera etc.
2. Output Devices those devices on which we obtaininformation out from the computer. Example: Monitor, Printer.
3. Central Processing Unit central unit which does all the
processing, accepts data from input device and send processeddata to the output device.
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A Basic Model of a Computer
Control Unit
ALU
Main Memory
Auxiliary Storage
Disks, FDD, CD-ROM/RW
Input Output
UnitInterprets stored
Instructions,
Issues
Commands to
All the elements
Of theComputer
Data /Instructions Results of Processing
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Have you seenCPU? If so how it looks like?
Ans: It looks like BOX
No,
You are talking about cabinet, which includes following:
Processor
RAM/ROM
Floppy Disk Drive
Hard Disk Drive
Optical Drive
Power Supply Unit
Mother Board
Ports
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Computer Software
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Types ofComputer Software
Computer software can be categorized into following two categories:1. System Software: includes those software that help in better utilization
hardware resources.
Example Operating System, Compiler, Disk Drivers etc.
2. Application Software: includes those software that helps in performing
a particular task such as creating a document, preparing a presentation.
These are general purpose software's.
Example: Ms-Word, Excel, Power Point, etc.
3. Utility Software: includes those software that generally comes along
with operating system used to perform basic activities.Example: Disk Format Utility, Disk Defragmenter Utility, etc.
4. Customized Software : includes software which are specially designed
for a particular group of users.
Example: Software for a bank, hospital, business organization, etc.