Chapter 1 Introduction to information processing 1.1 Basic concept of Input Process Output Open the shared folder 2015-2016_S4ICT - SectionA Create a Google Docs called S4XYY_chapter1 where 4X is your class and YY is your class number. Comments of setting permission: - Setting permission is important in ICT. Sharing is a security control. - You should not change other's file permission for fun. - 3 of you haven't create the file in the folder. 4B10 set up 2 file, 4C01 set a wrong file name. Your file name should be strictly followed the format - By default, the file is shared to all S4 ICT students. So you should change the permission. You are the owner, rhs-ct@rhs.edu.hk CAN EDIT, Remove other users. Q1: Advantage of computer? Fast / accurate Huge storage space Q2: Activities 1 (P.5) 1. Buying Drinks through a vending machine.
2. Washing clothes with a washing machine
Five Basic components in a computer - CPU - Input device - Output device - Storage device: Primary / Main memory (RAM, ROM) , Secondary Storage (Hard disk, DVD/RW, USB drive, memory card) Can a computer run without Hard disk? Can a computer run without Main memory? - Communication device Q3: Name several Input devices. (at least 5) - mouse / trackball - keyboard - Web camera - Scanner - Microphone Q4: Name several Output devices (at least 5) - Printer - Monitor, Projector - speaker - headphone / earphone Q5: State five types of multimedia elements. Text, Graphics, Audio, Video, animation 1.2 Use of stored Programs Program is a sequence of commands. You should load your program into Main memory (RAM) before execution. Examples: Scripting language: *.cmd / *.bat in windows, javascript Other program: App Inventor, Scratch. Without Secondary storage, you have to retype the program every time you boot up a computer 1.3 Difference between data and information Data is a collection of raw facts. Information is data has been organised. Some hot topics: Big Data, Data mining 1.4 Types of data Revision 1 Byte = 8 bits KB: KiloByte MB: MegaByte GB: GigaByte TB: TeraByte PB: PetaByte Discuss in more details in chapter 3 Raw data: Text, image, video, audio Animation is generated by computer. More details will be discussed in Chapter 4. Text are represented by character coding system Demo: debug command in windows, dump, trace, unassembly Q6 Complete the following 2 tables Common Character coding system
1.5 Components of an information system. Information System transform data into information Data --> Information Common objective of an information system - forecasting - planning - coordination - control - decision making - operational activities Library using manual system
Q7 Refer to P.13-17 of the textbook, Complete the 2 tables below Example: A point of sales System (Example) At the front end, the point of sales terminal
An information system consists of five interrelated components:
1.6 Information process Information Life Cycle Example: to automate the library system
1.7 Information Technology and the Information Age Web based services In S1-S3, we learnt Google Doc, Sheets, Presentation, Scratch, App Inventor. Some new terms: IoT: Internet of Things (萬物互聯) O2O: Online to Offline. Information age: Information spreads rapidly and widely. People can access up-to-date information easily. Knowledge based society Computers Communication networks - Broadband - Mobile network: 3G / 4G People: - Information literate Answer the questions in Self Assessment corner (P.33) submission: Sept 22 Home work on Google Docs (Submit on Oct 7) P.34 - P.38. MC: 1- 10 SQ: 1-3 LQ: 1 - 2 Test on Oct 9 (Day 10) - 1 hour |