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Design Technology (First Exam 2027)

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IB Computer Science Study & Revision Notes (SL/HL)

Browse syllabus-aligned IB Computer Science revision notes by topic. Open each chapter for explanations, examples, and summaries.

1.1 Systems in organizations

1.1.1 Planning for a New System

9 minute read

1.1.2 The Importance of Change Management

4 minute read

1.1.3 Compatibility Challenges

9 minute read

1.1.4 Comparing System Implementation Approaches

6 minute read

1.1.5 Installation Methods and Their Evaluation

8 minute read

1.1.6 Data Migration Issues

7 minute read

2.1 Computer organization

2.1.1 CPU and Machine Instruction Cycle

13 minute read

2.1.2 Types of Memory

14 minute read

2.1.3 Functions of an Operating System

7 minute read

2.1.4 Features of Applications

22 minute read

3.1 Networks

3.1.1 Types of Networks

8 minute read

3.1.2 Importance of Network Standards

8 minute read

3.1.3 Communication Layers in Networks

4 minute read

4.1 General principles

5.1 Abstract data structures

5.1.1 Recognizing Recursive Thinking

8 minute read

5.1.2 Tracing Recursive Algorithms

3 minute read

5.1.3 Characteristics of a Two-Dimensional Array

6 minute read

6.1 Resource management

6.1.1 Managing Key Resources

10 minute read

6.1.2 Evaluating System Resources

11 minute read

6.1.3 Multi-Access and Multi-Programming Environments

3 minute read

6.1.4 Resource Management Techniques

13 minute read

7.1 Control

7.1.1 Types of Control Systems

9 minute read

7.1.2 Real-World Examples of Control System

9 minute read

7.1.3 Input Devices for Data Collection

8 minute read

7.1.4 Ethical and Social Impacts of Control Systems

6 minute read

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1.1 Systems in organizations

1.1.1 Planning for a New System

9 minute read

1.1.2 The Importance of Change Management

4 minute read

1.1.3 Compatibility Challenges

9 minute read

1.1.4 Comparing System Implementation Approaches

6 minute read

1.1.5 Installation Methods and Their Evaluation

8 minute read

1.1.6 Data Migration Issues

7 minute read

2.1 Computer organization

2.1.1 CPU and Machine Instruction Cycle

13 minute read

2.1.2 Types of Memory

14 minute read

2.1.3 Functions of an Operating System

7 minute read

2.1.4 Features of Applications

22 minute read

3.1 Networks

3.1.1 Types of Networks

8 minute read

3.1.2 Importance of Network Standards

8 minute read

3.1.3 Communication Layers in Networks

4 minute read

4.1 General principles

5.1 Abstract data structures

5.1.1 Recognizing Recursive Thinking

8 minute read

5.1.2 Tracing Recursive Algorithms

3 minute read

5.1.3 Characteristics of a Two-Dimensional Array

6 minute read

6.1 Resource management

6.1.1 Managing Key Resources

10 minute read

6.1.2 Evaluating System Resources

11 minute read

6.1.3 Multi-Access and Multi-Programming Environments

3 minute read

6.1.4 Resource Management Techniques

13 minute read

7.1 Control

7.1.1 Types of Control Systems

9 minute read

7.1.2 Real-World Examples of Control System

9 minute read

7.1.3 Input Devices for Data Collection

8 minute read

7.1.4 Ethical and Social Impacts of Control Systems

6 minute read

1.1.7 Types of Testing

4 minute read

1.1.8 User Documentation and Its Importance

7 minute read

1.1.9 Methods of Delivering User Training

7 minute read

1.1.10 Causes of Data Loss

15 minute read

1.1.11 Managing Software Releases and Updates

11 minute read

1.2 System design basics

1.2.1 Components of a Computer System

6 minute read

1.2.2 Roles of Computers in a Networked World

8 minute read

1.2.3 Social and Ethical Issues in a Networked World

10 minute read

1.2.4 Identifying Relevant Stakeholders

4 minute read

1.2.6 Visualizing System Requirements

6 minute read

1.2.7 Prototyping

8 minute read

1.2.8 Iteration in Design

4 minute read

1.2.9 End-User Involvement

5 minute read

1.2.10 Social and Ethical Impacts

6 minute read

1.2.11 Usability and Accessibility

15 minute read

2.1.5 Data Representation Terms

7 minute read

2.1.6 Boolean Operators

9 minute read

3.1.4 VPN Technologies

12 minute read

3.1.5 Speed Variations in Data Transmission

10 minute read

3.1.6 Data Compression in Transmission

4 minute read

3.1.7 Transmission Media

5 minute read

3.1.8 Packet Switching

11 minute read

3.1.9 Importance of Protocols

9 minute read

3.1.10 Wireless Networks

16 minute read

3.1.11 Network Security Methods

12 minute read

4.1.1 Procedures and Sub-Procedures

4 minute read

4.1.2 Decision-Making Situations

4 minute read

4.1.3 Inputs and Outputs in a Solution

3 minute read

4.1.4 Pre-Planning in Problem Solutions

3 minute read

4.1.5 Pre- and Post-Conditions

5 minute read

4.1.6 Exceptions in Problem Solutions

5 minute read

4.1.7 Understanding Concurrency

7 minute read

4.1.8 Abstraction

8 minute read

4.2 Connecting computational thinking and program design

4.2.1 The Choice of Algorithms and Standard Algorithms

8 minute read

4.2.2 Standard Operations of Collections

4 minute read

4.2.3 Algorithm as a Flow Chart

2 minute read

4.2.4 Constructing Pseudocode

6 minute read

4.2.5 Efficiency of Algorithms

5 minute read

4.3 Introduction to programming

4.3.1 Fundamental Operations of a Computer

11 minute read

4.3.2 Features of a Computer Language

3 minute read

4.3.3 Need for Higher-Level Languages

10 minute read

4.3.4 Variables, Constants, and Operators

5 minute read

4.3.5 Algorithms with Loops and Branching

4 minute read

4.3.6 Characteristics of a Collection

5 minute read

5.1.4 Stacks

7 minute read

5.1.5 Queue

6 minute read

5.1.6 Arrays as Stacks and Queues

5 minute read

5.1.7 Logical Operations of Linked Lists

6 minute read

5.1.8 Trees

10 minute read

5.1.9 Static and Dynamic Data Structures

8 minute read

5.1.10 Suggesting Data Structures

6.1.5 Benefits of Dedicated Operating Systems

8 minute read

6.1.6 The Role of a Virtual Machine

5 minute read

7.1.5 Centralized vs. Distributed Control Systems

8 minute read

7.1.6 Role of Autonomous Agents

7 minute read

A. Databases

A.1 Basic concepts

A.1.1 Data vs. Information

4 minute read

A.1.2 Transactions and Data Consistency

10 minute read

A.2 The relational database model

A.2.1 DBMS and RDBMS

10 minute read

A.2.2 The Term Schema

3 minute read

A.2.3 Data Dictionary

3 minute read

A.2.4 Data Definition Language (DDL)

7 minute read

A.2.5 Data Modelling in Database Design

2 minute read

A.2.6 Database Terms

7 minute read

A.2.7 Relationships in Databases

2 minute read

A.2.8 Redundant Data

8 minute read

A.2.9 Referential Integrity

5 minute read

A.2.10 Normalization Forms

4 minute read

A.2.11 Evaluating Data Types

10 minute read

A.2.12 Entity-Relationship Diagrams (ERDs)

6 minute read

A.2.13 Designing Relational Databases

10 minute read

A.2.14 Queries and Views

3 minute read

A.2.15 Simple and Complex Queries

3 minute read

A.2.16 Methods to Construct a Query

7 minute read

A.3 Further aspects of database management

A.3.1 Role of a Database Administrator

5 minute read

A.3.2 User Interaction with Databases

4 minute read

A.3.3 Methods of Data Recovery

9 minute read

A.3.4 Integrated Database Systems

8 minute read

A.3.5 Use of Databases in Various Fields

11 minute read

A.3.6 Privacy of Personal Data

15 minute read

A.4 Further database models and database analysis

A.4.1 Characteristics of Different Database Models

14 minute read

A.4.2 Object-Oriented vs. Relational Databases

10 minute read

A.4.3 Definition of Data Warehousing

13 minute read

A.4.4 Advantages of Data Warehousing

4 minute read

A.4.5 ETL Processes in Data Warehousing

6 minute read

A.4.6 Discovering Patterns with Data Mining

8 minute read

B. Modelling and simulation

B.1 The basic model

B.1.1 Definition of Computer Modelling

6 minute read

B.1.2 Variables in Modelling

8 minute read

B.1.3 Limitations of Mathematical Models

4 minute read

B.1.4 Sensible Grouping for Data Items

3 minute read

B.1.5 Designing Test Cases

9 minute read

B.1.6 Effectiveness of Test Cases

8 minute read

B.1.7 Correctness of a Model

4 minute read

B.2 Simulations

B.2.1 Simulations vs. Models

10 minute read

B.2.2 Processing Data with Rules

6 minute read

B.2.3 Rules and Data Representation

3 minute read

B.2.4 Constructing Simple Models

8 minute read

B.2.5 Evaluating Simulation Test Cases

6 minute read

B.2.6 Simulation Requirements

5 minute read

B.3 Visualization

B.3.1 Visualization

4 minute read

B.3.2 Memory Needs of 2D Visualization

6 minute read

B.3.3 Three-Dimensional Visualization

5 minute read

B.3.4 Memory and 3D Visualization

6 minute read

B.3.5 Time and Memory Considerations in 3D Animation

5 minute read

B.4 Communication modelling and simulation

B.4.1 Genetic Algorithms

7 minute read

B.4.2 Structure of Neural Networks

4 minute read

B.4.3 Applications of Neural Network Modelling

9 minute read

B.4.4 Neural Networks for Pattern Recognition

9 minute read

B.4.5 Structures of Natural Language

5 minute read

B.4.6 Human vs. Machine Language

10 minute read

C. Web science

C.1 Creating the web

C.1.1 Internet vs. World Wide Web

2 minute read

C.1.2 Evolution of the Web

5 minute read

C.1.3 Characteristics of Web Technologies

9 minute read

C.1.4 Uniform Resource Identifier and URL

5 minute read

C.1.5 Purpose of a URL

6 minute read

C.1.6 Domain Name Server

6 minute read

C.1.7 Internet Protocols

6 minute read

C.1.8 Components of a Web Page

6 minute read

C.1.9 Protocols and Standards on the Web

6 minute read

C.1.10 Types of Web Pages

2 minute read

C.1.11 Static vs. Dynamic Web Pages

3 minute read

C.1.12 Functions of a Browser

13 minute read

C.1.13 Client-Side vs. Server-Side Scripting

7 minute read

C.1.14 Web Pages and Data Sources

9 minute read

C.1.15 Common Gateway Interface (CGI)

3 minute read

C.1.16 Web Page Structure

12 minute read

C.2 Searching the web

C.2.1 Search Engines

4 minute read

C.2.2 Principles of Search Algorithms

7 minute read

C.2.3 How Web Crawlers Function

7 minute read

C.2.4 Metadata and Web Crawlers

6 minute read

C.2.5 Parallel Web Crawling

7 minute read

C.2.6 Web-Indexing in Search Engines

8 minute read

C.3 Distributed approaches to the web

C.3.1 Mobile and Distributed Computing

11 minute read

C.3.2 Interoperability and Open Standards

7 minute read

C.3.3 Hardware for Distributed Networks

7 minute read

C.3.4 Role of Distributed Systems in Web Growth

10 minute read

C.3.5 Lossless vs. Lossy Compression

4 minute read

C.3.6 Effectiveness of Compression Software

5 minute read

C.4 The evolving web

C.4.1 Growth of Online Interaction

8 minute read

C.4.2 Cloud Computing Architecture

6 minute read

C.4.3 Effects of Cloud Computing

11 minute read

C.4.4 Copyright and Intellectual Property

6 minute read

C.4.5 Privacy and Authentication

7 minute read

C.4.6 Future of Web Infrastructure

9 minute read

C.5 Analysing the web

C.5.1 Web as a Directed Graph

4 minute read

C.5.2 Web Graph vs. Sub-Graphs

7 minute read

C.5.3 Web Graph Features

7 minute read

C.5.4 Role of Graph Theory in Web Connectivity

5 minute read

C.5.5 Page Rank Algorithm

7 minute read

C.5.6 Power Laws and Web Development

5 minute read

C.6 The intelligent web

C.6.1 Semantic Web vs .Text-Web vs. Multimedia-Web

7 minute read

C.6.2 Aims of the Semantic Web

8 minute read

C.6.3 Ontology vs. Folksonomy

5 minute read

C.6.4 Folksonomies and Social Structures

4 minute read

C.6.5 Expressivity and Usability in Semantic Web

4 minute read

C.6.6 Searching Methods for Semantic Web

5 minute read

D. Object-oriented programming (OOP)

D.1 Objects as a programming concept

D.1.1 Nature of an Object

3 minute read

D.1.2 Unified Modeling Language (UML)

5 minute read

D.1.3 Decomposition of a Problem

4 minute read

D.1.4 Relationships Between Objects

8 minute read

D.1.5 Data Types for Representing Data

3 minute read

D.1.6 Passing Data to and from Actions

2 minute read

D.2 Features of OOP

D.2.1 Encapsulation

7 minute read

D.2.2 Inheritance

7 minute read

D.2.3 Polymorphism

4 minute read

D.2.4 Libraries of Objects

7 minute read

D.2.5 Disadvantages of OOP

5 minute read

D.2.6 Modularity

14 minute read

D.3 Program development

D.3.1 Key Terminologies

5 minute read

D.3.2 Object Methods and Access

5 minute read

D.3.3 Selection Statements

3 minute read

D.3.4 Repetition Statements

5 minute read

D.3.5 Static Arrays

3 minute read

D.3.6 Internationalization Features

4 minute read

D.4 Advanced program development

D.4.1 Understanding Recursion

7 minute read

D.4.2 Tracing Recursive Algorithms

3 minute read

D.4.3 Object References

3 minute read

D.4.4 Abstract Data Type (ADT) List

6 minute read

D.4.5 Applications of Lists

1 minute read

D.4.6 Static List Implementations

5 minute read

A.3.7 Openness of Databases to Interrogation

11 minute read

A.3.8 Data Matching vs. Data Mining

6 minute read

A.4.7 Situations Benefiting from Data Mining

12 minute read

A.4.8 Predictive Modeling in Data Mining

6 minute read

A.4.9 Database Segmentation

2 minute read

A.4.10 Link Analysis in Databases

4 minute read

A.4.11 Deviation Detection in Databases

9 minute read

B.2.7 Improving Rules and Formulas

7 minute read

B.2.8 Constructing Complex Simulations

4 minute read

B.2.9 Data Collection Changes

7 minute read

B.2.10 Evaluating Simulation Reliability

11 minute read

B.2.11 Advantages and Disadvantages of Simulation

8 minute read

B.2.12 Ethical and Social Considerations in Predictions

10 minute read

B.4.7 Evolution of Machine Translators

6 minute read

B.4.8 Chatbots and Conversation Simulation

6 minute read

B.4.9 Advances in Natural Language Processing

13 minute read

C.2.7 Improving Search Results

7 minute read

C.2.8 Metrics Used by Search Engines

4 minute read

C.2.9 Search Engine Effectiveness

4 minute read

C.2.10 White Hat and Black Hat SEO

5 minute read

C.2.11 Challenges for Growing Search Engines

7 minute read

C.4.7 Web Monopolies

9 minute read

C.4.8 Decentralized and Democratic Web

8 minute read

C.6.7 Ambient Intelligence vs. Collective Intelligence

6 minute read

C.6.8 Ambient Intelligence for Support

9 minute read

C.6.9 Collective Intelligence for Complex Issues

11 minute read

D.3.7 Ethical and Moral Obligations

8 minute read

D.4.7 Linked List Algorithms with Object References

5 minute read

D.4.8 Standard Library Collections

6 minute read

D.4.9 Tracing List Implementations

3 minute read

D.4.10 ADT Stack, Queue, and Binary Tree Features

7 minute read

D.4.11 Importance of Style and Naming Conventions

4 minute read

MYP Subjects

IB Computer Science Study & Revision Notes (SL/HL)

1. System fundamentals

1.1 Systems in organizations

2. Computer organization

2.1 Computer organization

3. Networks

3.1 Networks

4. Computational thinking, problem-solving and programming

4.1 General principles

5. Abstract data structures (HL)

5.1 Abstract data structures

6. Resource management (HL)

6.1 Resource management

7. Control (HL)

7.1 Control

Save your notes progress

1. System fundamentals

1.1 Systems in organizations

2. Computer organization

2.1 Computer organization

3. Networks

3.1 Networks

4. Computational thinking, problem-solving and programming

4.1 General principles

5. Abstract data structures (HL)

5.1 Abstract data structures

6. Resource management (HL)

6.1 Resource management

7. Control (HL)

7.1 Control

1.2 System design basics

4.2 Connecting computational thinking and program design

4.3 Introduction to programming

A.1 Basic concepts

A.2 The relational database model

A.3 Further aspects of database management

A.4 Further database models and database analysis

B.1 The basic model

B.2 Simulations

B.3 Visualization

B.4 Communication modelling and simulation

C.1 Creating the web

C.2 Searching the web

C.3 Distributed approaches to the web

C.4 The evolving web

C.5 Analysing the web

C.6 The intelligent web

D.1 Objects as a programming concept

D.2 Features of OOP

D.3 Program development

D.4 Advanced program development