1. Introduction to Management Information Systems Chapter 1 & 3 Summary and Review HTM 304 Fall 07

2. 2 Chapter 1: MIS Basic Concepts Basic concepts Management Information Systems: -- The development and use of information systems to achieve business goals and objectives Information Systems: -- A group of components that produces information Information: -- 4 different definitions, use to determine information or data: Microsoft’s stock costs $43.5 per share (data) The average wait time for a customer at a call center (information) Information is relative. One person’s information may become another person’s data. Information System Research: How to design the system, which can: a) take the raw data and process them into the information (all business majors) b) provide the decision maker good information so as to make the right decision  achieve business goals and objectives

3. Chapter 1 Continue Good Information Good information helps decision maker make the right decision General Guidelines: SMART Example: The average temperature on the surface of the moon would probably not be good information for a financial analyst, because it may violate which of the following characteristics of good information? a. just sufficient. b. timely. c. relevant. d. accurate. e. worth its money

4. Chapter 1 Components of Information Systems Five components Memorize the five components Give examples of the five components E.g. songs downloaded from itune store is an example of the ________ component. From the five components’ point of view, what is the network / Internet? Which is the most important one among those five?

5. Chapter 3: Computer Basics Basic Logical Operation: And, Or, Not… Binary System: How to count? How to convert? Question: 1. What does “bit” stand for? 2. Given a binary number, how to judge whether the number is odd or even?

6. 6 Binary Numeral System Computers represent data using binary digits, called bits. Bits are used for computer data because they are easy to represent physically. Direction of Magnetism, etc. Some old time machines: (watch the video clip and answer questions) Computers use bits for two purpose: Instruction For example: a sequence 0111100010001110 means adding two numbers together. Data

7. 7 Computer Data Bits are grouped into 8-bit chunks called bytes. What is the largest value for a byte? Example 1: Color. Many software applications use 3 Bytes (24bits) to represent color. RGB Value Windows System: 32 bits. Example 2: IP address. Example 3: Characters (ASCII Table)

8. 8 Exercise: Computer A is broadcasting its IP address 192.3.28.29 to the network. How the electric signals are sent via the network? Draw the square wave. Binary Sequence 11000000 00000000 0001110 00011101

9. 9 Important Storage-Capacity Terminology

10. 10 Ambiguity of Binary Data A binary sequence 0100 0001 can be used to represent both decimal value 65 and the character A How to convert between upper case letters and lower case letters? Case sensitive? This ambiguity is more than curiosity; virus authors and other cyber-criminal use it to their advantage.

11. 11 A simple example of encryption LettersBytes Encrypted Code Encrypted Letter “H”0100 10000100 1101M “e”0110 01010110 0000` “l”0110 11000110 1001i “l”0110 11000110 1001i “o”0110 11110110 1010j E.g. Reverse the logic on the 1 st and 3 rd bits from the right Exercise Handout Set 5

12. 12 Exercise Handout Set 5

13. 13 Summary Learning Binary to understand more about computer Logic Operations: AND, OR, NOT Count Binaries Conversion: binary  decimal, decimal  binary Binary addition (not required) Use bytes to represent information 1 byte = ? bits Check ASCII table for information

14. 14 Field Study Assignment Read the handout and Chapter 3 Find your group member Prepare a presentation to address the questions in the handout.