Computer Applications

The Information and Communication Technology in workplace

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OVERVIEW

• Information System and Information Technology

• The World of Computers

• The Component of Computers

• The Categories of Computers

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What is Information System?

“Information system (IS) is a system of communication between people which is

involved in the gathering, processing, distribution and use of information.”

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What is Information Technology?

“The information system supported with the use of technology such as computing technology and communication technology is called as Information Technology (IT) or Information

Communication Technology (ICT)”

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The World of Computer

Computers are everywhere

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What is Computer?

• A computer is an electronic device, operating under the control of instructions stored in its own memory.

Information Processing Cycle

Collect Data (Input)

Processing Produces

Information (Output)

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The components of a computer

• “A computer contains many electric, electronic, and mechanical components

known as hardware”

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The components of a computer

Input Device

Output Device

System Unit Storage Device

Communication Device

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The components of a computer

Input Device

• Allow you to enter data and instruction into a computer

Output Device

• Hardware component that conveys information to one or more people

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The components of a computer

System Unit

• Case that contains the electronic components of the computer that are used to process data.

Storage Device

• Holds data, instruction, and the information for future use

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The components of a computer

Communication Device

• Enables a computer to send and receive data, instructions, and information to and from one or more computers or mobile devices

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Advantages and Disadvantages of using Computers

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Categories of Computers

• Personal Computers

• Mobile Computers and Mobile Devices

• Game Consoles

• Servers

• Mainframes

• Supercomputer

• Embedded Computer

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Personal Computers

• A personal computer can performs all of its input, processing, output, and storage activities by itself

• Two popular architectures are PC and the APPLE.

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Mobile Computers

• Personal Computer that you can carry from one place to another place

• Examples include notebook and netbook.

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Mobile Devices

• Computing device that small enough to hold in your hand.

• Examples include smart phones, PDAs, and digital camera.

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Game Consoles

• “Refer to the mobile computing device designed for single player or multiplayer video

games.”

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Servers

“A server used to control access to the hardware, software, and other resources on a

network.”

Provides a centralized storage area

for programs, data and information.

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Mainframes

“A mainframes is a large, expensive, powerful computer that can handle hundred or thousand

of connected users simultaneously.”

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Mainframes computers

• Mainframes are used for problems which are limited by input/output and reliability and for handling multiple business transactions

concurrently

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Supercomputers

• A supercomputers is the fastest, most powerful computer

• The fastest supercomputers are capable of processing more than one quadrillion instructions in a single second.

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Supercomputers

Supercomputers are used for scientific and engineering problems which are limited by

processing speed and memory size.

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Embedded Computers

• “Refer to a special-purpose computer that functions as component in a larger product.”

For examples:

1.Automobiles – Airbag Controller

2.Consumer Electronic – Answering machines/ Telephone

3.Computer Devices- Faxes, Printers and Copiers

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Computer Applications

The Information and Communication Technology in workplace

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