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We are a circle of friends that met in mysterious ways. We have been sharing course material we find online with each other. Here we list a selection of it and, in some cases, our study notes.

For an introduction to computer science, and in particular to C, you might want to consider reading How to Think Like a Mathematician, The New Turing Omnibus and taking CS50 (lectures, and psets).

Soft Skills
- Economics, Law and Ethics
- Business Studies
- Cybercrime
- Geopolitics (pt-br)
- Marketing
- Patents
- Philosophy
- Project Appraisal
- Technical Communication and Research Skills

Science
- Chemistry
  - Foundations of Chemistry
- Computer Science
  - Algorithms
  - Programming Languages
  - Quantum Computing
  - Software Systems
    - Compilers
      - 1. Construction
      - 2. Optimising
    - Information Management
      - 1. A First Course in Database Systems
      - 2. Database System Implementation
    - Information Theory
    - Operating System Design and Implementation
      - 1. A First Course in Operating Systems
      - 2. Systems research (Advanced Operating Systems)
    - Concurrency
  - Systems Fundamentals
    - 1. Unix Fundamentals
    - 2. Unix Tools
    - 3. Systems Administration
  - Theoretical Computer Science
  - Intelligent Systems
    - Artificial Inteligence
    - Knowledge Representation and Reasoning
    - Natural Language Processing
  - Interaction Design
- Mathematics
  - Topics in Elementary Mathematics
  - Real Analysis
    - Single Variable (pt-pt)
    - Multivariable (pt-pt)
  - Algebra
    - Linear Algebra and Analytic Geometry
    - Abstract Algebra
    - Group Theory
    - Category Theory
    - Tensor Products
  - Differential Equations and Difference Equations (pt-pt)
  - Complex Analysis
  - Vector Calculus and Partial Differential Equations
  - Geometry
  - Differential Geometry
  - Logic and Formal Proof
  - Number Theory, Cryptography and Applications
  - Singular Value Decomposition
  - Topology (pt-pt)
  - Fourier Analysis
  - Linear Analysis
- Physics
  - Mechanics
  - Electricity and Electromagnetism
  - Vibrations and Waves
  - Thermodynamics and Structure of Matter
  - Topics of Modern Physics
  - Quantum Mechanics
  - Dynamical Systems

Technology
- LaTeX (pt-pt)
- MATLAB
- Programming Fundamentals
  - C and C++
  - Erlang
  - GOLang
  - Haskell (pt-pt)
  - Java
  - FreePascal + Lazarus (pt-pt)
  - Lisp
    - Common Lisp
    - Scheme
  - ML
  - OCaml
  - Prolog
  - Python
  - ADA

Engineering
- Software Engineering
- Cybersecurity
  - Applied Cryptography
  - Building Information Governance
  - Cryptocurrencies
  - Digital Preservation
  - Forensics
  - Fraud Detection
  - Information Security Management
  - Network Security
  - People and Security - Social Engineering
  - Privacy-Enhancing Technologies
  - Reverse Engineering
  - Security and Applications in Smartcards
  - Systems and Data Security
  - Theory and Practice of Cyber Security Attacks
  - Understanding and Mitigating Malware
- Graphics and Visual Computing
  - Computer Animation
  - Computer Graphics
  - OpenGL
  - Interactive Graphics
  - Game Engine Programming
  - Image Processing
  - Multimedia
  - Virtual and Augmented Reality
- Computational Science
  - Bioinformatics
  - Complexity
  - Computational Chemistry
  - Computational Mathematics with SageMath
  - Computational Physics
  - Control
    - Automatic Control
    - Linear and Nonlinear State-Space Control Theory
  - Decision Support Methods
  - Game Theory
  - High Performance Computing
  - Numerical Analysis
  - Optimisation
  - Probability
  - Probability for Computer Scientists
  - Statistics
  - Simulation and Modelling
- Computer and Electronics Engineering
  - Acquisition and Digital Signal Processing
  - Computer-aided Design (CAD)
  - Computer Music
  - Computer Systems Design
    - Computer Hardware
    - Instruction Set Architectures (ISA)
      - X86 ISA
      - ARM ISA
      - IA-32 ISA
      - MIPS ISA
    - Electronic Computer-aided Design (ECAD)
    - History of Computing
  - Computer Vision
  - Digital Electronics
  - Electromechanical Systems
  - Embedded Systems
  - Robotics
    - Autonomous Robotic Systems
    - Mobile Robotics
    - Robot Kinematics and Dynamics
  - System-on-Chip Design
  - Networks Engineering
    - Protocols and Principles of the Internet
    - Network Administration
    - Mobile Communication Networks
    - Network Science (Complex Graphs Theory)

Data Science and Engineering