I took work I did from Librarything in 2021 where i broke out the specific subject areas after matching them to their FAST subject headings (I think or maybe it was from each book’s LibraryThing categories? – anyway, multiple for each book) and I ran it through ChatGPT4 asking it to match those subject names with DDC #’s. A few new ones _should_ show up compared to the list from 2021 from the books themselves (hidden categories / hidden classifications)

I took work I did from Librarything in 2021 where i broke out the specific subject areas after matching them to their FAST subject headings (I think or maybe it was from each book’s LibraryThing categories? – anyway, multiple for each book) and I ran it through ChatGPT4 asking it to match those subject names with DDC #’s. A few new ones _should_ show up compared to the list from 2021 from the books themselves (hidden categories / hidden classifications)

Dewey Decimal Number Standardized Dewey Decimal Name
1.64 Special Purpose Computing
1.9 General Themes in Knowledge
1.9 Specific Themes in Knowledge
3.3 Computer Simulation
4 Computer Science
4 Computer Science and Technology
4.0151 Machine Theory
4.22 Embedded Computer Systems
4.6 Computer Networks – Synchronization
5.1 Computer Algorithms
5.1 Programming
5.1 Software Engineering
5.13 Object-Oriented Programming
5.131 Computer Science – Rewriting Systems
5.43 Operating Systems
5.43 Operating Systems (Computers)
6.216 Computational Complexity
6.3 Artificial Intelligence
6.3 Cognitive Science
6.31 Machine Learning
6.312 Data Mining
6.312 Semantic Integration in Computer Systems
6.32 Neural Networks
6.35 Natural Language Processing
6.6 Computer Graphics
6.6 Image Processing
6.758 Videotex Systems
20 Libraries
25.042 Information Storage and Retrieval Systems
25.042 Ontologies in Information Retrieval
25.3 Abstracting and Indexing
25.3 Indexing
100 Philosophy
110.1 Metaphysics – Categories
111 Metaphysics – Ontological Concepts
111 Metaphysics – Ontology
111.85 Aesthetics – Ancient
113 Metaphysics – Creation
115 Metaphysics – Time
121 Epistemology
121.6 Underdetermination in Theory of Knowledge
121.68 Epistemology – Analogy
121.68 Epistemology – Information Theory
128.2 Philosophy of Mind
133 Occultism
133.333 Feng Shui
133.5 Astrology
133.5 Physiognomy
133.8 Parapsychology
150 Psychology
150.19 Psychology – Functionalism
152.14 Psychology – Perception
152.15 Psychology – Time Perception
152.4 Psychology – Optimism
152.42 Psychology – Happiness
153 Cognitive Psychology
153 Psychology – Cognition
153.12 Memory & Physiology
153.12 Psychology – Memory
153.14 Psychology – Mnemonics
153.15 Learning and Memory
153.15 Mathematical Ability
153.35 Psychology – Creative Ability
153.43 Psychology – Problem Solving
153.7 Psychology – Attention
153.83 Decision Making
153.83 Psychology – Decision Making
153.9 Psychology – Multiple Intelligences
155 Developmental Psychology
155.2 Developmental Psychology – Self-Esteem
155.232 Developmental Psychology – Introversion
155.4 Developmental Psychology – Child Development
155.5 Developmental Psychology
155.5 Developmental Psychology – Adolescence
155.9042 Developmental Psychology – Stress
158.1 Adjustment and Personal Development
158.1 Personal Development
158.1 Psychology – Self-Actualization
158.1 Psychology – Self-Improvement
158.12 Psychology – Meditation
160 Logic
160 Logic – Sorites Paradox
160 Logic – Vagueness
160 Reasoning and Logic
170 Ethics
177.7 Ethics – Caring
177.7 Ethics – Kindness
179.3 Ethics – Human-Animal Relationships
179.6 Ethics – Courage
191 Quine, W. V. (Willard Van Orman) – Philosophy
194 Deleuze, Gilles – Philosophy
194 Duhem, Pierre Maurice Marie – Philosophy
200 Religion
204 Spirituality
300 Social Sciences
301 Sociology
302 Interpersonal Relations
302 Social Interaction
302.14 Social Skills
303.49 Social Prediction
305 Social Groups
305.8 Sociology – Cultural Pluralism
306 Culture
306 Social Conditions
306 Sociology – Culture
306.1 Furry Fandom – Social Aspects
306.1 Popular Culture
306.1 Sociology – Subculture
306.1 Subcultures and Social Aspects
306.3 Sociology – Lifestyles
306.38 Sociology – Retirement
306.481 Culture – Fandom
331.702 Labor Economics – Vocational Guidance
336.207 Transfer Payments
338.542 Economic Forecasting
338.9 Economic Assistance
339.47 Economics – Consumption
342.730853 Freedom of Information
355.4 Military Strategy
361 Social Welfare and Public Services
361.61 Services for the Poor
362 Public Health
362.5 Social Services – Families
362.556 Public Welfare – Brazil
363.34 Disaster Relief
363.34 Emergency Management
363.348 Emergency Food Supply
363.61 Emergency Water Supply
370 Education
370.152 Education – Learning
371.95 Education – Gifted Children
384.3 Information Policy
390 Customs and Folklore
390 Customs, Etiquette, & Folklore
391 Costume – Social Aspects
395 Manners and Customs
401.43 Linguistics – Semantics
410 Linguistics
410.285 Computational Linguistics
415 Linguistics – Grammar
415 Linguistics – Systemic Grammar
418 Applied Linguistics
418.0071 Linguistics – Second Language Acquisition
500 Natural Sciences and Mathematics
500 Science
501 Philosophy of Science
501 Science – Uncertainty
507 Science – Research Methodology
507 Science Methodology
507.2 Science – Methodology
510 Mathematics
510 Mathematics – Symbolic and Mathematical
510 Mathematics – Themes and Applications
510 Mathematics – Theory
510.1 Metamathematics
510.1 Philosophy of Mathematics
510.71 Mathematics Education & Social Aspects
510.92 Biography – Mathematicians (Richard)
511.3 Computational Complexity
511.3 Mathematics – Sequences
511.32 Set Theory – Axiomatic Set Theory
511.322 Descriptive Set Theory
511.322 Set Theory – Equivalence Classes
511.322 Set Theory – Equivalence Relations
511.35 Lambda Calculus
511.5 Graph Theory
511.5 Graph Theory – Random Graphs
511.6 Combinatorial Analysis
511.6 Discrete Mathematics
512 Algebra
512.2 Algebra – Group Theory
512.5 Ordered Algebraic Structures
512.7 Number Theory
514 Geometry
514 Topology
514.74 Geometry – Fractals
515.39 Differentiable Dynamical Systems
515.42 Ergodic Theory
515.94 Topology – Transformation Groups
516 Geometry
516.01511 Geometry – Data Processing
516.15 Geometry – Shapes
516.15 Geometry – Symmetry
516.21 Geometry – Voronoi Polygons
519.7 Information Theory
520 Astronomy
520.92 Astronomy – Biographies
523.1 Cosmology
523.7 Plasma Astrophysics
530 Physics
530.01 Philosophy of Physics
530.12 Quantum Theory
530.13 Statistical Physics
530.14 Physics – Causality
530.143 Quantum Electrodynamics – Dirac Equation
530.143 Relativistic Quantum Theory
530.41 Physics – Interfaces
530.417 Physics – Surfaces
531 Classical Mechanics – Dynamics
531.14 Classical Mechanics – Friction
531.6 Classical Mechanics – Force and Energy
532 Fluid Mechanics
539.7 Quantum Electrodynamics
541.3 Surface Chemistry
541.3 Surface Chemistry Research
541.395 Chemistry – Surface Active Agents
541.6 Surface Chemistry
548.5 Crystallography – Crystal Growth
548.6 Crystallography – Epitaxy
551.22 Earthquakes
551.22 Seismology
551.63 Meteorology – Weather Forecasting
570 Life Sciences
570.1 Philosophy of Biology
571.2 Plant Physiology
571.6 Cytology
571.64 Plant Physiology – Cell Interaction
571.64 Plant Physiology – Cellular Signal Transduction
571.7 Chronobiology
572 Biochemistry
572.5 Biochemistry
573.8 Neurobiology
573.8 Neurophysiology
574.01 Biological Systems Theory
576.8 Evolutionary Biology
580 Botany
600 Technology and Engineering
610 Medicine
610.28 Biomedical Engineering
610.28 Medical Instruments and Apparatus
610.28 Medical Technology
612.132 Physiology – Microcirculation
612.2 Physiology – Metabolism
612.8 Cognitive and Neurological Processes
612.8 Neurophysiology – Consciousness
612.8 Neurosciences
612.8 Physiology – Neurophysiology
612.804 Physiology – Neurochemistry
612.82 Cognitive Neuroscience
612.85 Physiology – Hearing
613 Health
613.7 Physical Fitness
613.7046 Physical Fitness – Yoga
613.713 Bodybuilding
615 Pharmacology – Therapeutics
615.53 Integrative Medicine
615.851 Pharmacology – Therapeutic Use
616.025 Emergency Medicine
616.0252 First Aid
616.462 Diabetes
616.8 Brain Diseases
616.8 Neurology
616.8527 Depression
617 Surgery
617.620285 Robotics in Medicine
620 Engineering
620.00151 Engineering Mathematics
620.11 Engineering Materials
620.5 Thin Films
621.367 Image Processing
621.367 Image Processing – Digital Techniques
621.381 Electronics
621.381 Microelectronics
621.3815 Electrical Engineering – Transducers
621.3822 Signal Processing
621.38224 Digital Filters
621.89 Lubrication
629.8 Automatic Control
629.8 Bond Graphs
629.8 Intelligent Control Systems
629.8312 Adaptive Control Systems
629.89 Mechatronics
629.892 Robotics
640 Home Economics
641 Cooking and Cuisine
641.3 Food Storage
641.5 Cooking
641.52 Food Mixes
641.555 Quick and Easy Cooking
641.563 Natural Foods Cooking
641.567 Jewish Cooking
641.5784 Outdoor Cooking
641.588 Slow Cooking
641.5884 Electric Cooking
641.594 European Cooking
641.5941 British Cooking
641.5973 American Cooking
643 Do-It-Yourself Work
646.204 Serging
646.72 Cosmetics
649 Child Rearing
658.0412 Home-Based Businesses
658.4012 Management – Forecasting
658.4012 Management – Prediction
658.4038 Management Information Systems
658.827 Marketing – Brand Name Products
658.872 Electronic Commerce
671.52 Vapor-Plating
681.113 Horology – Clocks and Watches
681.114 Horology – Clock and Watch Makers
681.114 Horology – Clock and Watch Making
684.16 Rustic Woodwork
700 Arts
701.17 Art – Indic Aesthetics
701.85 Art – Color Theory
704.9436 Art – Anthropomorphism
741 Drawing Technique
741.2 Drawing Technique – Doodles
781.11 Musical Perception
781.2 Music Acoustics
781.242 Musical Pitch
783.043 Music – Voice Culture
786.7 Electronic Musical Instruments
790 Leisure
794.8 Computer Games
794.8 Minecraft (Computer Game)
808.066 Technical Writing
809.38766 Literature – Fantasy & Social Aspects
910 Travel
981 Brazil – History & Geography

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