Data and Information Difference between Data and Information
Data and Information
Difference between Data and Information n What is Data? n n What is Information? n n n Age, Height, Weight, Score, … The average mark of ICT in F. 4 The average height of students in 4 A… Can you guess what is the difference between data and information? (P. 9)
Types of Data n n Text Images Audio Video
Text n Character coding systems n n n American Standard Code for Information Interchange (ASCII) Unicode Big 5 code
Image n Bitmap n n Image is represented by color dots (pixels) Vector Graphics n n Vector graphics are composed of a number of objects Vector objects are defined by mathematical formulae
Audio and Video n Audio n n WAV AAC MP 3 Video n n n AVI MPEG MPV
Components of Information System n n n Purposes Data Processes Technologies Personnel
Information Processes n n n n Data collection Organization Storage Processing Analysis Transmission Presentation
Information Process (Data Collection) n It is the activity of collecting raw data from outside world. n n n Personal interviews Telephone interviews Questionnaires Experiments Surveys…
Information Processing (Organization) n After the data has been collected, it must be organized into certain formats for further processed. n n n Manual validity checking Data categorization etc
Information Processing (Storage) n n Store the data for processing later Non-digital storage n n n Paper Files Digital storage n n n CD-ROMs DVDs Hard disks, floppy disks, magnetic tapes …
Information Processing (Processing) n Data processing n n n n Sorting Searching Merging Calculating Word processing (MS Word, Open Office…) Image processing Video processing and audio processing
Information Processing (Analysis) n Extract useful information n Graphs Charts …
Information Processing (Transmission) n n Sending information from one computer to another. Protocol n n n TCP/IP FTP SMTP, POP 3
Information Processing (Presentation) n Present information n n Lists, tables and charts Can be presented through different media n n Audio Video Screen displayed Printed outputs
HW (HWB) Content 8/9/2009 Ch. 1 SQ #3 -5; LQ #1
Format 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)
HWA Content 3/9/2009 Ch. 1 Worksheet
- Slides: 18