CHAPTER 8: DIGITAL STORAGE

INTRODUCTION:

STORAGE

HARD DISKS

Hard disks

-contains one or more inflexible, circular platters that use magnetic particles to store data, instructions and information.

Characteristics of hard disks:

FLASH MEMORY STORAGE

Flash memory chips

-type of solid state media and contain no moving parts

Memory card

-removable flash memory device that can be insert and remove from a slot in a computer, mobile device or card reader / writer.

USB flash drive

-plug into a USB port on a computer or mobile device

CLOUD STORAGE

Cloud storage

-an Internet service that provides storage to computer or mobile devices

OPTICAL DISKS

Optical Disks

-consists of flat, round, portable disc made of metal, plastic and lacquer that is written and read by a laser.

OTHER TYPES OF STORAGE

Magnetic Stripe card

-contains a magnetic stripe that stores information

Smart card

-stores data on an integrated circuit embedded in the card

Microfilm and microfiche

-store microscopic images of documents on a roll or sheet film

CONCLUSION:

There are variety storage options with the storage capacity. So the user should know how to use it to backup file in case of emergency when the original cannot be retrieved.

CHAPTER 5: DIGITAL SAFETY AND SECURITY

INTRODUCTION:

DIGITAL SECURITY RISKS

What is a cybercrime?

-an online or Internet-based illegal act

Hacker and Cracker

INTERNET AND NETWORK ACCESS

Malware

-any software intentionally designed to cause damage to a computer, server or computer network.

Firewall

-hardware or software that protects a network's resources from instrusion

UNAUTHORIZED ACCESS AND USE

SOFTWARE THEFT

Software theft occurs when someone:

-steals software media

-intentionally erases program

-illegally registers and/or activates a program

-illegally copies a program

Product activation

-online or by phone

-users provide the software product's identification number to associate the software with the computer or mobile device on which the software is installed.

Information theft

-steals personal or confidential information

Encryption

-process of converting data that is readable by humans into encoded characters to prevent unauthorized access.

HARDWARE THEFT, VANDALISM AND FAILURE

Hardware theft

-act if stealing digital equipment

Hardware vandalism

-act of defacing or destroying digital equipment

BACKING UP-THE ULTIMATE SAFEGUARD

Backing up

-duplicate of a file

-can e used if original is lost

-example: can use cloud storage

ETHICS AND SOCIETY

Computer ethics

-moral guidelines that govern the use of computers, mobile devices and information systems.

Green computing

-reducing the electricity and environmental waste while using computers, mobile devices, and related technologies.

INFORMATION PRIVACY

Phishing

-a scam

-a perpetrator sends an official looking email message that attempts to obtain the person's personal or financial information.

CONCLUSION:

It is important to take precautions and to know variety of digital security risks. This is because there are many cybercrime and cybercriminals. Everyone should know various backup strategies and methods of securing wireless communications.

CHAPTER 4: PROGRAMS AND APPS

INTRODUCTION:

OPERATING SYSTEM:

What is operating system?

-Set of programs that coordinates all the activities among computers or mobile device hardware.

-example: Windows

PRODUCTIVITY APPLICATIONS

With productivity applications, users can,

Word processing software

-allows users to create and manipulate documents

Clip art

-collection of drawings, photos and other images

Spreadsheet software

-allows users to organize data in rows and columns and perform calculations

Database software

-allows users to create, access and manage a database

GRAPHICS AND MEDIA SOFTWARE

Examples:

COMMUNICATIONS APPLICATIONS

Example:

-Blogging

-Browsing

-Chat room

-Discussion forum

SECURITY TOOLS

✔ Personal firewall

-security tool that detects and protects a personal computer and its data from unauthorized instrusions

✔ Antivirus program

-protects computer against virus and malware

-remove any virus found in memory

Spyware and Adware

FILE AND DISK MANAGEMENT TOOLS

File manager

-tool that performs functions related to file management

Search tool

-program included with operating system.

-it attempts to locate file in computer or mobile device based on criteria that specify

Disk cleanup tool

-searches for and removes unnecessary files

CONCLUSION:

There are many useful program and apps available for the computer and mobile devices. It features variety of applications. Hence we should use it wisely especially in security tools.

CHAPTER 3: COMPUTERS AND MOBILE DEVICES

INTRODUCTION:

COMPUTERS AND MOBILE DEVICES

DESKTOP AND MOBILE DEVICES

Personal computer

-a computer designed for use by one person at a time

Desktop

-a personal computer designed to be in a stationary location, where all of its components fit on or under a desk or table.

Laptop

-a thin, lightweight mobile computer with a screen on its lid and a keyboard in its base.

SERVERS

Server

-a computer dedicated to providing one or more services to other computers or devices on a network.

Example:

-Rack Server

-Blade server

-Tower server

SUPERCOMPUTERS

Supercomputer

-the fastest, most powerful, most expensive computer

TERMINALS

ATM

-a self-service banking terminal that connects to a host computer through a network

CLOUD COMPUTING

MOBILE DEVICES

Smartphone

-a mobile phone that performs many of the functions of a computer, typically having a touchscreen interface, Internet access, and an operating system capable of running downloaded apps.

Digital camera

-mobile device that allows users to take photos and store the photographed images digitally

GAME DEVICES

Game console

-a mobile computing device designed for a single-player or multiplayer video game

Examples: Gamepad, Joystick and Dance pad

EMBEDDED COMPUTERS

Embedded computers

-a special purpose computer that functions as a component in a larger product

-examples: consumer electronics, automobiles and home automation devices.

PORTS AND CONNECTIONS

PROTECTING HARDWARE

How to protect hardware?

-cables

-cables can lock computers and help prevent theft of equipment

Reasons hardware can fail

-aging hardware

-electrical power problems

-undervoltage

Surge protector

-provide a stable current flow

HEALTH CONCERNS USING TECHNOLOGY

Repetitive strain injury (RSI)

-injury or disorder of muscles,nerves, tendons, ligaments and joints.

Computer vision syndrome (CVS)

-technology related health condition that affects eyesight.

CONCLUSION:

It is important for us to know the characteristics of purchasing guidelines for desktops, laptops, tablets and digital cameras so that we can use it efficiently in future. We must also know ways to protect hardware and health concerns of using technology plus the preventive measures for a better use.

CHAPTER 2:THE INTERNET

INTRODUCTION:

EVOLUTION OF THE INTERNET

CONNECTING THE INTERNET

Wired

-computer or device physically attaches via a cable or wire to a communication device

Example:

-Cable Internet Service

Wireless

-Computers without a communication device can use a wireless modem

Example:

-WI-FI (wireless fidelity)

IP Address- numerical label assigned to each device connected to a computer network that uses the Internet Protocol for communication.

THE WORLD WIDE WEB

TYPES OF WEBSITES

What is search engine?

-a software

-finds websites, images, videos and other information related to a specific topic.

MEDIA ON THE WEB

Multimedia- content that uses a combination of different content forms such as text, audio, images, animations, video and interactive content.

Graphic

- digital representation of non-text information

-examples: GIF and JPEG

OTHER INTERNET SERVICES

Email- transmission of messages and files via a computer network

Instant messaging (IM)- real-time Internet communication service

Chat- real-time typed conversation that takes place on a computer or mobile device

NETIQUETTE

-code of acceptable Internet behavior

CONCLUSION:

The evolution of Internet in 1969 and thus creates the web which as benefits us, the human beings very much.Thus when various websites were created,other services were available on Internet such as email which widely used in business and administration throughout the world. Not only that, when using the Internet must must have a good behavior so that everyone can have a pleasant and better online communication.

CHAPTER 1: DIGITAL LITERACY

INTRODUCTION:

COMPUTER:

What is a computer?

☺an electronic device, operating under the control of instructions stored in its own memory.

How does it work?

MOBILE GAMES AND DEVICES

Example:

-smartphone

-digital camera

-game console

DATA AND INFORMATION

THE INTERNET:

What is a browser?

-a software

-application used to access and view websites

What is a search engine?

-a software

-allows internet users to search for content via the World Wide Web (WWW).

DIGITAL SAFETY AND SECURITY

Users should protect their computers and mobile devices:

-viruses and other malware

-privacy

-health concerns

-environmental issues

PROGRAMS AND APPS

What is a software?

-a program, tells the computer what task to perform and how to perform them

Software developer?

-someone who develops programs and apps

COMMUNICATION AND NETWORKS

What is a network?

-collection of computers and devices connected together via communications devices and transmission media.

USES OF TECHNOLOGY IN SOCIETY

-Finance

-Travel

-Science

CONCLUSION:

We need to know the basic concepts of computer. Plus, to know the importance of digital security and safety risks and precautions which will help us in our life. Hence, to apply the uses of technology for a better future.