Information Systems Study Notes

Information Systems

Objective

  • Major components of information systems.
  • Basic history of information systems.
  • Arguments behind the "I.T. Matters" article.
  • Importance of staying digitally literate in a constantly changing technological landscape.

Digital Literacy

  • Involves current knowledge and understanding of computers, mobile devices, the web, and related technology.
  • Technology is used in various environments: education, government, and business.
  • Technology users can be categorized into five different groups:
    • Home users
    • Office users
    • Mobile users
    • Power users
    • Enterprise users

Definition of an Information System

  • Consists of components and the roles these components play in an organization.
  • Components include: hardware, software, data, people, and processing.
Hardware
  • A computer is an electronic device operating under the control of instructions stored in its own memory.
  • Different types of computers: laptops, desktops, servers, and mobile devices.
  • Includes routers, switches, and hubs for network communication.
Software
  • Not explicitly defined, but implied as programs and applications that run on hardware.
Data and Information
  • Data is a fact.
  • Information is something useful.
Communication Devices and Media
  • Communication device: hardware capable of transferring items from a computer or device to transmission media and vice versa.
  • Transmission media:
    • Bounded: copper wire, fiber optic cable.
    • Unbounded: Wi-Fi, Bluetooth, radio.
People and Processes
  • People: Users of the system.
  • Processes: Procedures and instructions for using the system.
  • Role of computer components is to take data and turn it into information.

Role of an Information System

  • To transfer data into useful information.
  • Utilizes hardware, software, data, people, and processing components.

Evolution of Information Systems

  • Early 1950s: Mainframe computers.
    • Expensive, with multiple terminals connected.
    • Slow due to shared resources.
  • PCs
    • Cheaper, allowing individual ownership.
    • Applications run locally.
    • Challenge: resource sharing between PCs.
  • Client-Server Architecture
    • Introduced to allow resource sharing within organizations.
  • Internet
    • Enabled resource sharing between different organizations.
    • Issue: content readability across different applications.
  • HTTP and HTML
    • HTTP introduced as a protocol to transmit documents in HTML format.
    • Ensured content viewability with a browser.
  • Public Domain
    • Connecting to the internet enters the public domain.
    • Opportunities: selling products to the public.
    • Risks: viruses and attacks.
    • Importance of antivirus software.

Clean Computing

  • Focus on reducing electricity consumption and environmental waste.
  • Strategies:
    • Recycling.
    • Using energy-efficient hardware.
    • Utilizing energy-saving features.

Web 2.0 and Cloud Computing

  • Early internet: limited user interaction.
  • Web 2.0: user interaction through social media platforms (Facebook, blogs, chat).
  • Cloud computing: reliance on cloud systems instead of personal PCs.

Internet and the Web

  • Internet: a worldwide collection of computer networks connecting millions of businesses, government agencies, educational institutions, and individuals.
  • Web: a global library of information available to anyone connected to the internet.
  • Importance of internet access for informed decision-making.

Troubleshooting Example: User Unable to Print

  • Applying the five components of information systems to diagnose the problem:
    • Hardware: printer issues (no paper, no power).
    • Software: incorrect driver or application API issues.
    • Data: unsupported format.
    • People: sent the job to the wrong printer, lack of training.
    • Processes: permission issues.
  • Network connection issues (wired or wireless).

Discussion Points

  • Which of the five components is the most important?
  • Open discussion on solving the printing problem.

Assignment Questions

  • List the five components of an information system.
  • Briefly explain what an information system is.
  • A computer is an electronic device operating under the control of instructions stored in its own memory.
  • What is the difference between data and information?
    • Data is a fact, and information is something useful.
  • What is the role of an information system?
    • The information system turns data into information.
  • Evolution: Mainframes, PCs, client-server architecture, the internet, and today, cloud computing.
  • What does clean computing involve?
    • Clean computing involves reducing electricity consumption and environmental waste generated when using computers.