ICT APPLICATIONS
0417 - CHAPTER 6
BY SUBHAN
IGCSE SYLLABUS 2023-25’
_________________________________________________________________________
COMMUNICATIONS
1. Paper-Based
(Newsletters/Posters)
●​ Use: Inform about events/dates
(e.g., schools).
●​ Pros: Regular releases,
permanent copy.
●​ Cons: Distribution needed, no
multimedia, printing costs,
uncertain reach.
2. Websites
●​ Use: Host text, graphics, video,
sound; requires coding/hosting.
●​ Pros: Multimedia, hyperlinks,
global reach, interactivity.
●​ Cons: Security risks, needs
maintenance, requires internet.
3. Multimedia Presentations
●​ Use: Mix of animations, video,
sound; projected for audiences.
●​ Pros: Engaging, interactive,
holds attention.
●​ Cons: Expensive equipment,
may distract, risk of overuse.
4. Media Streaming
●​ Use: Real-time audio/video (e.g.,
YouTube, Spotify).
●​ Pros: On-demand access,
cost-effective, large content
library.
●​ Cons: Needs stable internet, no
ownership, content restrictions.
5. E-Publications
●​ Use: Digital books/magazines
read on devices.
●​ Pros: Portable, affordable,
interactive.
●​ Cons: Eye strain, no physical
feel, compatibility issues.
6. Posters vs. E-Publications
●​ Posters: Static, physical, limited
reach.
●​ E-Pubs: Dynamic, multimedia,
globally accessible.
7. Mobile Communication
●​ Methods:
○​ SMS: Quick text, async
communication.
○​ Calls: Basic,
network-dependent.
○​ VoIP: Internet-based calls.
○​ Video Calls: Real-time
(e.g., Zoom, FaceTime).
○​ Internet Access: Via
Wi-Fi/mobile dat
BOOKING SYSTEMS
Overview
Web-based platforms for reserving/purchasing tickets or services across
industries:
●​ Travel: Flights, hotels, holiday packages.
●​ Entertainment: Concerts, cinema tickets.
●​ Sports: Event/match tickets.
Advantages
●​ Convenience: 24/7 access, instant confirmations, e-tickets.
●​ Efficiency: Price comparisons, automated reminders, easy updates/repeat
bookings.
●​ Cost Savings: Fewer staff needed; promotions/personalized offers.
Disadvantages
●​ Technical Risks: Internet dependency, system failures, security/privacy
concerns.
●​ User Experience: Impersonal service, transaction fees.
●​ Employment Impact: Reduced staff demand may lead to job losses.
COMPUTER MODELLING
Advantages
Disadvantages
Less expensive than actually doing it
Costly to perform modelling anyways
Much safer
Human reluctance is a problem
Allows changing environmental
variables
Never 100% accurate as the input
affects the output
Doing it may be impossible in real life
May overlook nuanced factors a
human would likely consider
Faster and easily updated, reducing
repetitive manual work.
Introduces a level of uncertainty
Provides more precise results
compared to human-based methods
They may struggle to adapt to
unforeseen circumstances
Key Applications of computer modelling
1.​ Personal Finance
○​ Simulates financial scenarios and helps optimize decisions.
2.​ Bridge & Building Design
○​ Tests structural behavior, load capacity, and safety before construction.
○​ Reduces risks and improves design efficiency.
3.​ Flood Water Management
○​ Predicts flood risks, simulates water flow, and designs mitigation
strategies.
○​ Aids emergency planning and infrastructure development.
4.​ Traffic Management
○​ Simulates traffic flow, reduces congestion, and optimizes road
networks.
○​ Helps design better urban mobility solutions.
5.​ Weather Forecasting
○​ Models atmospheric and oceanic conditions for accurate predictions.
○​ Supports disaster preparedness with storm, temperature, and rainfall
forecasts.
COMPUTERS IN MEDICINE
1. Information Systems
●​ Patient Records:
○​ Digital databases store medical histories, treatments, and
prescriptions.
○​ Enable safer care by flagging drug interactions and allergies.
●​ Pharmacy Records:
○​ Track prescriptions, dosages, and dispensing history.
○​ Improve accuracy and prevent dangerous drug combinations.
2. 3D Printing in Medicine
●​ Prosthetics:
○​ Cost-effective production of artificial limbs, teeth, and hearing aids.
●​ Tissue Engineering:
○​ Combines cells and biomaterials to repair/replace damaged tissues.
●​ Artificial Blood Vessels:
○​ Synthetic structures that support blood flow for tissue regeneration.
●​ Customized Medicines:
○​ Personalized drug formulations with precise dosages for optimized
treatment.
COMPUTER CONTROLLED SYSTEMS
1. Robotics in Manufacturing
●​ Applications: Assembly, welding, packaging, and precision tasks.
●​ Advantages:
○​ Can operate in hazardous environments
○​ Work continuously without breaks
○​ Lower labor costs due to reduced human workforce
○​ Higher productivity and consistency
○​ Ideal for repetitive, tedious tasks
○​ Adaptable with different end-effectors for varied tasks
●​ Disadvantages:
○​ Struggle with unusual or complex tasks
○​ Can increase unemployment by replacing human jobs
○​ Lead to deskilling of the workforce
○​ Factories can relocate easily, reducing local job stability
○​ High initial setup and maintenance costs
2. Production Line Control
●​ Function: Computer-monitored coordination of machinery, inventory
tracking, and real-time adjustments.
●​ Benefits:
○​ Optimizes efficiency and reduces downtime
○​ Improves error detection and correction
○​ Enhances operational consistency
3. Autonomous Vehicles
●​ Applications: Self-driving cars, drones, and automated transport.
●​ Advantages:
○​ Improved safety with reduced human error
○​ Decreased traffic congestion
○​ Better fuel efficiency
Advantages
Disadvantages
Faster & more precise
High setup & maintenance costs
Works in extreme conditions
Lacks flexibility for unexpected tasks
No human error
Requires backup systems (failure risk)
Handles repetitive tasks efficiently
Can lead to unemployment
SCHOOL MANAGEMENT SYSTEMS
Computer-controlled school management systems streamline administrative
tasks such as attendance tracking, grading, scheduling, and student data
management, enhancing efficiency and organization in educational institutions.
Key Features & Components
1.​ Attendance Tracking
○​ Magnetic ID Cards: Students swipe cards containing personal details
for automated attendance.
○​ Biometrics: Fingerprint scanning ensures accuracy and prevents
forgery.
2.​ Learner Performance Monitoring
○​ Spreadsheets track and compare student performance over time.
3.​ Computer-Aided Learning (CAL)
○​ Digital tools supplement traditional teaching with interactive lessons
and online assessments.
Advantages
●​ Faster response to absentees.
●​ Improved parent communication.
●​ Reduced administrative burden on teachers.
●​ Biometrics over ID Cards: Prevents attendance fraud.
Disadvantages
●​ Requires staff training.
●​ High initial software costs.
●​ Security risks with unauthorized data access.
●​ Biometrics Drawbacks:
○​ Time-consuming fingerprint enrollment.
○​ Expensive scanning equipment.
○​ Unreadable if fingers are damaged.
○​ Privacy concerns over biometric storage.
Expert Systems
Definition:​
An AI-based computer program that replicates human expert decision-making by
applying domain-specific knowledge and rules to provide solutions or
recommendations.
Applications:
●​ Medical diagnostics
●​ Mineral prospecting
●​ Tax/financial calculations
●​ Strategy games (e.g., chess)
●​ Species/chemical identification
●​ Delivery route optimization
Key Components
1.​ User Interface
○​ Front-end interaction point for users.
○​ Requires training for effective operation.
2.​ Explanation System
○​ Provides reasoning behind conclusions.
○​ Offers actionable recommendations with probability scores.
3.​ Inference Engine
○​ Core processing unit.
○​ Searches knowledge/rules bases to solve problems.
4.​ Knowledge Base
○​ Database of domain-specific facts (objects/attributes).
5.​ Rules Base
○​ Logical rules guiding the inference engine.
Workflow Example: Medical Diagnosis
1.​ Input: Doctor answers symptom questions.
2.​ Processing: Inference engine matches symptoms against knowledge/rules.
3.​ Output:
○​ Possible diagnoses (with probabilities).
○​ Treatment suggestions.
○​ Explanation of logic.
Advantages vs. Limitations
Pros
Cons
24/7 availability
High development cost
Consistent decisions
Limited to narrow domains
Knowledge retention
Lacks human intuition
Fast problem-solving
Maintenance intensive
ONLINE BANKING
Key Systems & Features
1.​ ATMs
○​ Pros: 24/7 cash access, global use
○​ Cons: Security risks, withdrawal limits
2.​ Electronic Funds Transfer (EFT)
○​ Instant, secure digital payments
○​ Irreversible without investigation
3.​ Payment Cards
○​ Credit: Purchase protection but high interest
○​ Debit: Direct account access, no credit
4.​ Cheques
○​ Traceable but slow and fraud-prone
5.​ Online Banking
○​ Convenient but requires internet, risks fraud
Security Challenges
●​ Cyber threats (hacking, phishing)
●​ Physical risks (ATM theft, card skimming)
Future Trends
●​ Biometric authentication
●​ Blockchain/AI integration
ATM Transaction Process
Customer Action → System Process
1.​ Insert card → Connects to bank's computer
2.​ Enter PIN → Verifies:
○​ PIN correctness
○​ Card validity
○​ Blocks if stolen/exceeded attempts
3.​ Select "Cash" → Checks:
○​ Account balance
○​ Daily withdrawal limit
4.​ Confirm amount → Authorizes transaction if valid
5.​ Choose receipt → Dispenses cash + updates account
I removed a lot of the content here because only an idiot wouldn’t be
able to answer questions from this section
COMPUTERS IN RETAIL INDUSTRY
EFTPOS Sequence (IMPORTANT)
●​ Card Presentation: Customer inserts/taps/swipes card at terminal
●​ Amount Entry: Merchant inputs transaction value
●​ Verification: System checks card validity & account funds
●​ Authentication: PIN/signature required for security
●​ Bank Approval: Real-time authorization from card issuer
●​ Transaction Confirmation: Digital/printed receipt generated
●​ Funds Transfer: Merchant receives payment in 1-3 days
Point of sale (POS) terminals: Computerized systems used at checkout counters
to handle purchases and oversee stock. It is extensively used in retail stores to
process sales transactions.
INTERNET SHOPPING
Advantages for customers
Disadvantages for customers
Access to global market
Security concerns (fraud, data theft)
Easy product comparison
Can't physically examine products
Shop from anywhere
Long delivery times
Avoid queues & crowds
Extra shipping/handling fees
24/7 availability
No face-to-face customer service
Advantages for businesses
Disadvantages for businesses
Targeted pricing based on data
High competition
Real-time stock/price updates
Digital fraud risks
Lower-cost promotions
Website downtime/tech issues
Global customer reach
Delivery & return costs
Reduced staffing costs
Fake reviews harm reputation
RECOGNITION SYSTEMS
1. Optical Mark Recognition (OMR)
●​ Uses: School registers, multiple-choice exams, barcode/QR scanning
●​ Pros: Fast data entry, high accuracy
●​ Cons: Form design complexity, errors if filled incorrectly, limited to black ink
2. Optical Character Recognition (OCR)
●​ Example: Automatic Number Plate Recognition (ANPR)
○​ Process: Captures plate → Adjusts image → Segments characters →
Converts to text → Stores data
●​ Pros: Speed monitoring, automated parking, congestion control
●​ Cons: Easy to bypass (Cloning/Hiding)
3. RFID (Radio-Frequency Identification)
●​ Applications:
○​ Passports: Scans chip, compares photo, verifies eligibility
○​ Automobiles: Parking access, weight checks, production tracking
○​ Payments: Contactless cards/smartphones
●​ Pros: No line-of-sight, robust, fast, bulk detection
●​ Cons: Signal interference, hacking risks, high setup cost
4. Near Field Communication (NFC)
●​ Uses: Contactless payments (e.g., smartphones)
●​ Pros: Secure, convenient
●​ Cons: Short range, device compatibility issues
5. Biometric Recognition
●​ Methods: Fingerprint, face, iris, voice
●​ Pros: High accuracy, fast, non-intrusive
●​ Cons: Expensive setup, data storage needs, affected by dirt/illness
SATELLITE SYSTEMS
1. GPS/SatNav Systems
●​ Function: Determine location using satellite signals (requires ≥3 satellites)
●​ Applications: Vehicle navigation, tracking transport
●​ Pros:
○​ Real-time navigation with ETA
○​ Speed limit alerts
○​ Points of interest locations
●​ Cons:
○​ Outdated maps cause errors
○​ Signal loss issues
○​ Incorrect with wrong inputs
2. Geographic Information Systems (GIS)
●​ Function: Analyze spatial data
●​ Applications:
○​ Distance measurement
○​ Environmental protection
○​ Educational uses
●​ Pros:
○​ Integrates diverse data types
○​ Handles large datasets
●​ Cons:
○​ Steep learning curve
○​ High software costs
○​ Data-intensive
3. Media Communication Satellites
●​ Function: Transmit media content globally
●​ Pros:
○​ Wide coverage
○​ High bandwidth
○​ Secure transmissions
○​ Vital for remote areas
●​ Cons:
○​ Signal latency
○​ Weather interference
○​ Orbit maintenance needed
Note: All satellite systems depend on precise orbital positioning and can
experience signal disruptions from environmental factors. GPS requires multiple
satellites for triangulation, while communication satellites prioritize bandwidth
and coverage.