IT Basics, Computer Systems, and Digital Revolution

What is Information Technology (IT)?

Information Technology (IT) is the application of computers and telecommunications equipment to store, retrieve, transmit, and manipulate data in digital form. It encompasses hardware, software, networks, and the people who use them to solve real-world problems.

Key Definitions

• Data: Raw facts and figures (e.g., 2023, Kathmandu, 55 kg).
• Information: Processed data that is meaningful (e.g., Population of Kathmandu is 55 kg → incorrect; instead, Kathmandu’s population in 2023 is 1.5 million).
• Information Technology (IT): The technology used to handle data (e.g., databases, cloud storage, AI).
• Information System (IS): The combination of IT + people + processes to support decision-making (e.g., eSewa for bill payments, Khalti for transactions).

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Evolution of Information Technology

IT has evolved through generations, each introducing breakthroughs in speed, storage, and functionality.

Worked Example:

• 1st Gen (ENIAC): Used vacuum tubes, filled a room, and could perform 5,000 additions per second.
• 4th Gen (Smartphones): Use microprocessors (e.g., Apple A16) to run millions of operations per second.

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Computer Systems: Hardware and Software

A computer system consists of two main parts:

1. Hardware (physical components)
2. Software (instructions/programs)

1. Hardware Components

Key Hardware Devices

Worked Example:

• Ncell’s Customer Service System:
  • Input: Customer calls (microphone) → Processing: IVR system (CPU) → Output: Bill details (speaker/email).

2. Software Components

Software is classified into:

• System Software (manages hardware/software): OS (Windows, Linux), Device Drivers
• Application Software (performs tasks): Microsoft Word, Khalti app, Daraz shopping cart

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Types of Computers

Computers vary by size, speed, and purpose. Here’s a comparison:

Worked Example:

• Daraz Order Processing:
  • Microcomputer (Server): Handles thousands of orders per second.
  • Embedded System (POS): Used in Daraz partner shops for scanning products.

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Impact of IT on Society

IT has transformed business, education, healthcare, and daily life in Nepal and globally.

Applications in Nepal

1. eGovernance:
   • eSewa: Uses IT for online bill payments (electricity, water, taxes).
   • Citizen Service Portal: Digital ID verification via NID card database.

2. E-Commerce:

   • Daraz/Khalti: Uses cloud computing for inventory management and secure payments.

3. Healthcare:

   • Nepal Health Card: Digital health records stored in centralized databases.

4. Transportation:

   • Pathao: Uses GPS and AI for ride matching and traffic optimization.

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In the Real World

1. Khalti (Digital Payments)

   • Idea Used: Information Systems (IS) + Networking
   • How? Khalti connects users (mobile app) → banks (servers) → merchants (QR codes) via secure networks. Uses encryption to protect transactions.

2. NTC Smart Meters

   • Idea Used: Embedded Systems + IoT (Internet of Things)
   • How? Smart meters automatically send electricity usage data to NTC’s central server, reducing manual reading errors.

3. Pathao Ride Matching

   • Idea Used: Algorithms + Real-Time Data Processing
   • How? When you request a ride, Pathao’s server matches you with the nearest driver using GPS coordinates and AI-based demand prediction.

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Exam Tip

1. Definitions Matter: Always define IT, data, information, hardware, and software clearly in exams.
2. Compare and Contrast: Questions often ask to differentiate between generations of computers or types of computers (use tables).
3. Real-World Applications: Link concepts to Nepalese examples (eSewa, Khalti, NTC, Daraz) for full marks.
4. Diagrams: Draw computer system components or evolution of IT mindmaps to visualize answers.
5. Short vs. Long Answers:
   • Short (2 marks): Define IT or list hardware components.
   • Long (5+ marks): Explain how eSewa uses IT (input → processing → output) with examples.

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Summary Table for Quick Revision

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Practice Question: "Explain how the Khalti app uses IT concepts to facilitate digital transactions. Include hardware, software, and networking components in your answer." (Expected: 5 marks)