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Introduction to Computers by Mind Map: Introduction to Computers
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Introduction to Computers

A World of Computers

Computers are everywhere

What Is a Computer?

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

The Components of a Computer

A computer contains many electric, electronic, and mechanical components known as hardware

Input Device, Allows you to enter data and instructions into a computer

Output Device, Hardware component that conveys information to one or more people

System Unit, Case that contains the electronic components of the computer that are used to process data

Storage Device, Holds data, instructions, and information for future use

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

Advantages and Disadvantages of Using Computers

Advantages of Using Computers

Speed

Reliability

Consistency

Storage

Communications

Disadvantages of Using Computers

Health Risks

Violation of Privacy

Public Safety

Impact on Labor Force

Impact on Environment

Green computing involves reducing the electricity consumed and environmental waste generated when using a computer

Strategies include

Recycling

Regulating manufacturing processes

Extending the life of computers

Immediately donating or properly disposing of replaced computers

Networks and the Internet

A network is a collection of computers and devices connected together, often wirelessly, via communications devices and transmission media

The Internet is a worldwide collection of networks that connects millions of businesses, government agencies, educational institutions, and individuals

People use the Internet for a variety of reasons

Communicate

Research and Access Information

Shop

Bank and Invest

Online Trading

Entertainment

Download Music

Share Videos

Web Application

A social networking Web site encourages members to share their interests, ideas, stories, photos, music, and videos with other registered users

Computer Software

Software, also called a program, tells the computer what tasks to perform and how to perform them

Installing is the process of setting up software to work with the computer, printer, and other hardware

A programmer develops software or writes the instructions that direct the computer to process data into information

Categories of Computers

Personal computers

Mobile computers and mobile devices

Game consoles

Servers

Mainframes

Supercomputers

Embedded computers

Personal Computers

A personal computer can perform all of its input, processing, output, and storage activities by itse

Two popular architectures are the PC and the Apple

Desktop computer

Mobile Computers and Mobile Devices

Mobile Computer

Personal computer you can carry from place to place

Examples include notebook computers,laptop computers, andTablet PCs

Mobile Device

Computing device small enough to hold in your hand

Examples include smart phones,PDAs,handheldcomputers,portable media players, and digital cameras

Notebook computer

Tablet PC

Smart phone

PDA

Handheld computer

Portable media player

Digital camera

Game Consoles

A game console is a mobile computing device designed for single‐player or multiplayer video games

Servers

A server controls access to the hardware, software, and other resources on a network

Provides a centralized storage area for programs, data, and information

Mainframes

A mainframe is a large, expensive, powerful computer that can handle hundreds or thousands of connected users simultaneously

Supercomputers

A supercomputer is the fastest, most powerful computer

Fastest supercomputers are capable of processing more than one quadrillion instructions in a single second

Embedded Computers

An embedded computer is a special‐purpose computer that functions as a component in a larger product

Elements of an Information System

Hardware

Software

Data

People

Procedures

Examples of Computer Usage

Home User

Personal financial management

Web access

Communications

Entertainment

Small Office/Home Office User

Look up information

Send and receive e‐mail messages

Make telephone calls

Mobile User

Connect to other computers on a network or the Internet

Transfer information

Play video games

Listen to music

Watch movies

Power User

Work with multimedia

Use industry - specific software

Enterprise User

Communicate among employees

Process high volumes of transactions

Blog

Computer Applications in Society

Education

Finance

Government

Health Care

Science

Publishing

Travel

Manufacturing

Video: Computer History in a Barn