1. Natural/Physical Sciences
1.1. Astronomy
1.1.1. Astrophysics
1.1.2. Cosmology
1.2. Biology
1.2.1. Anatomy
1.2.2. Biochemistry
1.2.3. Biophysics
1.2.4. Evolutionary Biology
1.2.5. Genetics
1.2.6. Genomics
1.2.7. Molecular Biology
1.2.8. Neuroscience
1.2.8.1. Cognitive neuroscience
1.2.8.2. Computational neuroscience
1.2.9. Physiology
1.2.10. Zoology
1.3. Chemistry
1.4. Environmental Science
1.5. Geology
1.6. Logic
1.7. Mathematics
1.7.1. Foundation of mathematics
1.7.1.1. Theory of computation
1.7.1.2. Category theory
1.7.1.3. Set theory
1.7.1.4. Mathematical logic
1.7.2. Pure mathematics
1.7.2.1. Calculus
1.7.2.2. Geometry
1.7.2.3. Combinatorics
1.7.2.4. Group theory
1.7.2.5. Graph theory
1.7.2.6. Order theory
1.7.2.7. Algebra
1.7.2.8. Trigonometry
1.7.2.9. Differential geometry
1.7.2.10. Topology
1.7.2.11. Fractal geometry
1.7.2.12. Measure theory
1.7.2.13. Vector calculus
1.7.2.14. Differential equations
1.7.2.15. Dynamical systems
1.7.2.16. Chaos theory
1.7.2.17. Complex analysis
1.7.2.18. Number theory
1.7.3. Applied mathematics
1.7.3.1. Computational mathematics
1.7.3.1.1. Mathematical physics
1.7.3.1.2. Fluid dynamics
1.7.3.1.3. Numerical analysis
1.7.3.1.4. Optimization
1.7.3.1.5. Probability theory
1.7.3.1.6. Statistics
1.7.3.1.7. Cryptography
1.7.3.1.8. Mathematical finance
1.7.3.1.9. Game theory
1.7.3.1.10. Mathematical biology
1.7.3.1.11. Mathematical chemistry
1.7.3.1.12. Mathematical economics
1.7.3.1.13. Control theory
1.8. Meteorology
1.9. Physics
1.9.1. Theoretical physics
1.9.1.1. Quantum Gravity
1.9.1.2. Supersymmetry
1.9.1.3. String Theories
1.9.1.3.1. String Field Theory
1.9.1.3.2. M-Theory
1.9.2. General Relativity
1.9.3. Nuclear Physics
1.9.4. Particle Physics
1.9.5. Quantum Field Theory
1.9.6. Quantum Mechanics
1.9.7. Special Relativity
1.10. Earth and Planetary Sciences
1.11. Archaeology
2. Technologies/Applied Sciences
2.1. 3D Printing
2.2. Aeronautics
2.2.1. Aeronautical engineering
2.2.2. Aeronautical science
2.2.3. Aviation
2.2.4. Avionics
2.2.5. Rocketry
2.2.5.1. Propellant
2.3. Bioengineering
2.4. Biotechnology
2.4.1. Biocomputer
2.4.2. Biomanufacturing
2.4.3. Nanobiotechnology
2.4.4. Stem Cell
2.4.5. Synthetic Biology
2.5. Chemical Engineering
2.6. Cloud Robotics
2.7. Cognitive Science
2.8. Computer Engineering
2.8.1. Optical Computer
2.8.2. Quantum Computer
2.9. Computer Science
2.9.1. Algorithms
2.9.2. Applications
2.9.2.1. iOS applications
2.9.2.2. Android applications
2.9.3. Artificial Intelligence
2.9.3.1. Machine Learning
2.9.3.1.1. Deep Learning
2.9.4. Big Data
2.9.5. Bitcoin
2.9.6. Cloud computing
2.9.7. Computer Security
2.9.7.1. Computer Hacking
2.9.7.1.1. Cyber Weapon
2.9.8. Quantum Computing
2.9.9. Cryptology
2.9.10. Virtual Reality
2.10. Electrical Engineering
2.10.1. Electronics
2.11. Energy technology
2.11.1. Battery
2.11.2. Electricity
2.11.3. Nuclear Energy
2.11.3.1. Renewable Energy
2.11.3.1.1. Renewable Technology
2.11.4. Fuel
2.11.4.1. Biofuel
2.11.4.2. Fuel Cell
2.12. Epidemiology
2.13. Human Technology
2.13.1. Cybernetics
2.13.1.1. Brain-Computer Interface
2.13.1.1.1. Brain-Brain Interface
2.13.2. Human Augmentation
2.13.2.1. Cognitive Augmentation
2.13.2.2. Physical Augmentation
2.13.3. Implant
2.13.4. Medicine
2.13.4.1. Biochemical Engineering
2.13.4.2. Bioinformatics
2.13.4.3. Cardiology
2.13.4.4. Endocrinology
2.13.4.5. Genetic Medicine
2.13.4.6. Gynecology
2.13.4.7. Hematology
2.13.4.8. Hepatology
2.13.4.9. Nephrology
2.13.4.10. Neurology
2.13.4.11. Oncology
2.13.4.12. Ophthalmology
2.13.4.13. Otolaryngology
2.13.4.14. Pediatrics
2.13.4.15. Pharmacology
2.13.4.16. Pharmacy
2.13.4.17. Prosthetics
2.13.4.18. Psychiatry
2.13.4.19. Pulmonology
2.13.4.20. Radiology
2.13.4.21. Surgery
2.13.4.21.1. Brain Surgery
2.13.4.22. Transplant
2.13.4.23. Urology
2.13.5. Quantified Self
2.14. Materials Science
2.14.1. Metamaterials
2.15. Mechanical Engineering
2.16. Military Science
2.16.1. Warfare
2.16.1.1. Cyber warfare
2.17. Military Technology
2.17.1. Combat Aircraft
2.17.1.1. Lockheed Martin F-22 Raptor
2.17.1.2. Lockheed Martin F-35 Lightning II
2.17.2. Combat Ground Vehicle
2.17.3. Exoskeleton
2.17.4. Weaponary
2.17.4.1. Directed-Energy Weapon
2.17.4.2. Firearms
2.17.4.3. Armament
2.17.4.4. Rail gun
2.17.4.5. Stealth Technology
2.18. Nanotechnology
2.18.1. Nanomedicine
2.19. Robotics
2.19.1. Humanoid Robot
2.19.2. Unmanned Aerial Vehicle (Drone)
2.20. Space Technology
2.20.1. Rocket Engine
2.20.2. Satellite
2.20.3. Spacecraft
3. Humanity/Social Sciences
3.1. Anthropology
3.2. Arts
3.2.1. Cinematography
3.2.1.1. Movies
3.2.2. Cooking
3.2.2.1. Gourmet Cooking
3.2.3. Fine art
3.2.4. Fine Dining
3.2.4.1. Wine tasting
3.2.5. Literature
3.2.5.1. Fiction
3.2.5.1.1. Science Fiction
3.2.5.1.2. New node
3.2.6. Make-up
3.2.7. Photography
3.2.8. Pick-up
3.2.9. Writing
3.3. Astrology
3.4. Feng Shui
3.5. Business
3.5.1. Human Resource
3.5.2. Entrepreneurship
3.5.2.1. Fundraising
3.5.2.1.1. Crowdfunding
3.5.3. Marketing
3.5.3.1. Advertising
3.5.4. Finance
3.5.4.1. Financial markets
3.5.4.2. Financial products
3.6. Economics
3.6.1. Macroeconomics
3.6.2. Microeconomics
3.7. Geography
3.8. Law
3.9. Life
3.10. Linguistics
3.11. Philosophy
3.11.1. Epistemology
3.12. Political Science
3.12.1. Democracy
3.12.2. Autocracy
3.12.3. Psephology
3.13. Politics
3.14. Psychology
3.15. Recreation & Entertainment
3.15.1. Hospitality
3.15.1.1. Food and Beverage
3.15.1.1.1. Restaurant
3.15.2. TV show
3.15.3. Games
3.16. Religion
3.17. Sexuality
3.18. Sociology
3.19. Spirituality
3.20. Sports
3.20.1. Martial arts
3.20.1.1. Kung fu
3.20.1.2. Kick boxing
3.20.1.3. Karate
3.20.1.4. Taekwondo
3.20.1.5. Aikido
3.20.1.6. Kendo
4. Events/Locations/Entities
4.1. China (country
4.2. Facebook (company)
4.3. Google (company)
4.4. Holocaust (event)
4.5. United States of America (country)
4.5.1. California (state)
4.5.1.1. Silicon Valley
4.5.1.2. Stanford University
4.5.2. Harvard University
4.5.3. NASA (organization)
4.5.4. NSA (organization)