Data and InformationData and Information

Difference between Data and Difference between Data and InformationInformation

What is Data?What is Data? Age, Height, Weight, Score, …Age, Height, Weight, Score, …

What is Information?What is Information? The average mark of ICT in F.4The average mark of ICT in F.4 The average height of students in 4A…The average height of students in 4A…

Can you guess what is the difference between Can you guess what is the difference between data and information? (P.9)data and information? (P.9)

Types of DataTypes of Data

TextText ImagesImages AudioAudio VideoVideo

TextText

Character coding systemsCharacter coding systems American Standard Code for Information American Standard Code for Information

Interchange (ASCII)Interchange (ASCII) UnicodeUnicode Big5 codeBig5 code

ImageImage

BitmapBitmap Image is represented by color dots (pixels)Image is represented by color dots (pixels)

Vector GraphicsVector Graphics Vector graphics are composed of a number of Vector graphics are composed of a number of

objectsobjects Vector objects are defined by mathematical Vector objects are defined by mathematical

formulaeformulae

Audio and VideoAudio and Video

AudioAudio WAVWAV AACAAC MP3MP3

VideoVideo AVIAVI MPEGMPEG MPVMPV

Components of Information SystemComponents of Information System

PurposesPurposes DataData ProcessesProcesses TechnologiesTechnologies PersonnelPersonnel

Information ProcessesInformation Processes

Data collectionData collection OrganizationOrganization StorageStorage ProcessingProcessing AnalysisAnalysis TransmissionTransmission PresentationPresentation

Information Process Information Process (Data Collection)(Data Collection)

It is the activity of collecting raw data from It is the activity of collecting raw data from outside world.outside world. Personal interviewsPersonal interviews Telephone interviewsTelephone interviews QuestionnairesQuestionnaires ExperimentsExperiments Surveys…Surveys…

Information Processing Information Processing (Organization)(Organization)

After the data has been collected, it must be After the data has been collected, it must be organized into certain formats for further organized into certain formats for further processed.processed. Manual validity checkingManual validity checking Data categorization Data categorization etcetc

Information Processing (Storage)Information Processing (Storage)

Store the data for processing laterStore the data for processing later Non-digital storageNon-digital storage

PaperPaper FilesFiles

Digital storageDigital storage CD-ROMsCD-ROMs DVDsDVDs Hard disks, floppy disks, magnetic tapes …Hard disks, floppy disks, magnetic tapes …

Information Processing Information Processing (Processing)(Processing)

Data processing Data processing SortingSorting SearchingSearching MergingMerging CalculatingCalculating

Word processing (MS Word, Open Office…)Word processing (MS Word, Open Office…) Image processingImage processing Video processing and audio processingVideo processing and audio processing

Information Processing Information Processing (Analysis)(Analysis)

Extract useful informationExtract useful information GraphsGraphs ChartsCharts ……

Information Processing Information Processing (Transmission)(Transmission)

Sending information from one computer to Sending information from one computer to another.another.

ProtocolProtocol TCP/IPTCP/IP FTPFTP SMTP, POP3SMTP, POP3

Information Processing Information Processing (Presentation)(Presentation)

Present informationPresent information Lists, tables and chartsLists, tables and charts

Can be presented through different mediaCan be presented through different media AudioAudio VideoVideo Screen displayedScreen displayed Printed outputsPrinted outputs

HW (HWB)HW (HWB)

Content

8/9/2009 Ch.1 SQ #3-5; LQ #1

Format of homeworkFormat of homework

H Ch.1 SQ #3 – 5; LQ #1 8/9/2009

3 (a) State one difference between data and information.

Ans: Data is a collection of …….

(b) Describe how a bar …

Ans: The analogue bar code …

4 Turn off the machine (6)

Turn on the machine (1)

HWAHWA

Content

3/9/2009 Ch.1 Worksheet