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Library of Congress Subject Areas (6415)
- B Philosophy. Psychology. Religion (1017)
  - B Philosophy (General) (3)
  - BL Religion (5)
  - BP Islam. Bahaism. Theosophy, etc (2)
  - Psychology (1003)
    - Aggressiveness (6)
      - Bullying (3)
    - Body image (26)
    - Child psychology (21)
    - Cognition (63)
    - Cognitive psychology (207)
    - Consciousness (2)
    - Emotional Intelligence (40)
    - Emotions (77)
      - Happiness (3)
      - Surprise (11)
    - Knowledge, Theory of (2)
    - Meaning (Psychology) (10)
      - Semantics (9)
    - Organisational Psychology (4)
    - Psychology, Applied (15)
      - Counseling (6)
    - Stress (Psychology) (143)
      - Post-traumatic stress disorder (56)
  - BJ Ethics (11)
    - Conduct of life (2)
      - Altruism (2)
    - Discipline (2)
- C Auxiliary Sciences of History (4)
  - CS Genealogy (2)
    - Celebrities (2)
  - Errors, inventions, etc. (2)
    - Conspiracy theories (2)
- D History General and Old World (282)
  - D History (General) (12)
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    - D880 Developing Countries (3)
    - D901 Europe (General) (8)
  - DA Great Britain (191)
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      - Dublin (15)
  - DC France (9)
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  - DS Asia (23)
  - DT Africa (48)
- E History America (6)
  - E11 America (General) (1)
  - E151 United States (General) (5)
- F History United States, Canada, Latin America (3)
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- G Geography. Anthropology. Recreation (275)
  - G Geography (General) (1)
  - GE Environmental Sciences (60)
    - Environment (51)
  - GF Human ecology. Anthropogeography (2)
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        Dwellings--Security measures (1)
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      - Online dating (2)
  - GV Recreation Leisure (210)
    - Games and Amusements (107)
      - Computer Games. Video Games. (78)
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      - Online Games (14)
    - Sports (92)
      - Golf (2)
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      - Soccer (28)
      - Sports Sponsorship (5)
- H Social Sciences (3076)
  - H Social Sciences (General) (9)
  - HA Statistics (22)
  - HB Economic Theory (97)
    - Business Cycles. Economic Fluctuations (19)
    - Entrepreneurship (75)
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    - Development Economics (5)
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      - Power resources (1)
        Energy consumption (1)
  - HD Industries. Land use. Labor (1900)
    - Business Logistics (31)
      - Supply Chain Management (20)
      - Transportation of Goods and Trade Logistics (8)
    - HD28 Management. Industrial Management (1113)
      - Benchmarking (1)
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        Competitive Advantage (17)
      - Contingency Planning (4)
      - Human Resource Management (913)
        Absence Management (27)
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        Diversity (49)
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        Employee Retention (105)
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        Leadership (99)
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        Performance Management (372)
        Employee Engagement (163)
        Motivation (120)
        Reward Management (32)
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        Training and Development (70)
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        Induction (6)
      - Knowledge Management (10)
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      - Management of Change (47)
        Downsizing of an organization (1)
      - Organisational Behaviour (55)
        Organisational Culture (41)
        Organisational Learning (8)
      - Strategic Management (39)
      - Teamwork (3)
      - Total Quality Management (7)
      - Business Communication (17)
        Internal Communication (6)
      - Conflict Resolution (13)
        Mediation (4)
      - Project management (3)
    - HD61 Risk Management (12)
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        Women and Work (81)
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        Workplace Bullying (8)
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        Flexible work arrangements (16)
        Telecommuting (15)
      - Industrial Relations (79)
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        Multiculturalism in the Workplace (11)
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      - Quality of Work Life / Job Satisfaction (214)
      - Redundancy. Dismissal. (10)
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      - Talent Management (35)
    - Large Industry. Corporations. (59)
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    - Non Profit Organisations. Voluntary Sector. (63)
      - Carers (34)
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    - Outsourcing (4)
    - Small Business Sector (135)
    - Specific Industries (551)
      - Agriculture Industry (21)
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      - Aviation Industry (26)
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      - Fashion Industry (52)
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        Beverage industry (8)
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      - Cosmetics Industry (6)
      - Energy industries (2)
      - Funeral industry (1)
    - Trade Regulation (3)
  - HE Transportation and Communications (31)
    - Broadcasting Media (5)
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    - Urban Transportation (14)
    - Water Transportation (3)
      - Shipping (3)
  - HF Commerce (705)
    - Customer Service (54)
    - Electronic Commerce (99)
      - Mobile Commerce (4)
    - Foreign Investment (3)
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    - Industrial Marketing (3)
      - Business To Business Marketing (3)
    - Industrial Psychology (68)
      - Psychology of Leadership (2)
      - The Psychological Contract (17)
      - Workplace Stress (46)
    - Marketing (429)
      - Advertising (52)
        Endorsements in advertising (15)
      - Branding (73)
      - Consumer Behaviour (235)
      - Public Relations (5)
      - e Marketing (57)
      - Direct Marketing (3)
    - Personnel Management (20)
    - Telecommunications in Business (7)
      - Mobile Telephone Networks (2)
    - Business Ethics (33)
  - HG Finance (421)
    - Banking (93)
      - E-banking (28)
    - Credit. Debt. Loans. (50)
      - Bankruptcy (2)
    - Financial Services (87)
      - Irish Financial Services Centre (2)
    - Insurance (15)
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      - Foreign Direct Investment (9)
      - Stock Exchange (33)
        Irish Stock Exchange (9)
      - Investment Companies. Investment Trusts. Mutual Funds. (28)
      - Investment Strategy (10)
      - Private equity (3)
    - Money (41)
      - Currency (33)
        Euro (Single European Currency) (3)
      - Digital currency (4)
        Cryptocurrencies (4)
    - Securities Markets (1)
    - Share Ownership (3)
    - Financial Management (16)
    - Fintech (29)
  - HJ Public Finance (10)
    - Taxation (6)
  - HM Sociology (182)
    - Leadership (99)
    - Organisational Behaviour (16)
      - Organisational Culture (10)
    - Groups and Organisations (8)
    - Information Science (56)
      - Communication (51)
        Medical Informatics (45)
  - HN Social history and conditions. Social problems. Social reform (58)
    - Community Development (44)
    - Prisons (5)
  - HQ The family. Marriage. Woman (254)
    - Children (122)
      - Child Development (82)
      - Children's Rights (2)
    - Gender (70)
    - Domestic Violence (10)
    - Relationships (7)
    - Sexual life (7)
      - Sexual minorities (7)
  - HS Societies secret benevolent etc (1)
  - HT Communities. Classes. Races (55)
    - Racism (3)
    - Rural Sociology (2)
    - Urban Sociology (14)
    - China (10)
    - Immigrant Communities (20)
  - HV Social pathology. Social and public welfare (201)
    - Asylum Seekers and Refugees (5)
    - Charity Organisations (15)
    - Child Protection (4)
    - Criminology (48)
      - Crimes and Offences (43)
        Cyber Crime (25)
        Harassment (1)
        Sexual harassment (1)
        Money Laundering (2)
    - Police. Garda. (9)
      - Garda Sichana Ombudsman Commission (1)
    - Discrimination (34)
      - Age discrimination (3)
    - Welfare of older people (64)
  - Economics (118)
    - Business (1)
      - Accounting (1)
    - Macroeconomics (10)
    - Microeconomics (53)
      - Production (Economic theory) (52)
        Industrial productivity (52)
        Labor productivity (51)
    - Wealth (12)
      - Income (5)
        Retirement income (5)
        Pensions (5)
      - Poverty (4)
        Homelessness (2)
- J Political Science (105)
  - JA Political science (General) (8)
  - JF Political institutions (General) (8)
    - Public Administration (6)
      - eGovernment (2)
  - JL Political institutions (America except United States) (2)
    - South America (1)
  - JN Political institutions (Europe) (25)
    - European Union (11)
    - Ireland (14)
      - Government Departments (9)
  - JQ Political institutions Asia (1)
  - JS Local government Municipal government (44)
    - Public Sector (44)
      - Social Partnership (2)
  - JV Colonies and colonization. Emigration and immigration. International migration (21)
    - International Migration (16)
      - Emigration (3)
      - Immigration (2)
  - JZ International relations (1)
- K Law (50)
  - Copyright Law (4)
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    - Human Rights Law (1)
  - K Law (General) (4)
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    - Justice, Administration of (2)
      - Criminal justice, Administration of (2)
        Restorative justice (2)
  - KDK Republic of Ireland (33)
    - Data Protection (20)
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    - Health Safety and Welfare Act (1)
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    - Intellectual Property Law (6)
    - Trial by jury (1)
  - Commercial law (5)
    - Competition, Unfair (2)
  - Conflict of laws (1)
  - Criminal law (2)
- L Education (577)
  - L Education (General) (39)
  - LB Theory and practice of education (401)
    - LB1501 Primary Education (20)
    - LB1603 Secondary Education. High schools (33)
    - LB2300 Higher Education (200)
      - Assessment (3)
      - College student orientation (6)
    - LB2361 Curriculum (2)
    - Teaching Personnel (32)
      - Primary School Teachers (9)
      - Secondary School Teachers (5)
    - Early childhood education (134)
  - LC Special aspects / Types of education (239)
    - Blended Learning (30)
    - Distance Learning (16)
      - M-Learning (Mobile Learning) (8)
    - E-Learning (151)
      - M-Learning (Mobile Learning) (8)
    - Home Schooling (3)
    - LC5201 Education extension. Adult education. Continuing education (31)
    - Literacy (13)
    - Self Regulated Learning (14)
    - Vocational Education (10)
      - Apprenticeships (3)
    - Education for the Learning Disabled (13)
    - Learning disabilities (12)
  - LF Individual institutions (Europe) (10)
  - Group work in education (4)
- M Music and Books on Music (31)
  - M Music (31)
  - MT Musical instruction and study (1)
- N Fine Arts (17)
  - N Visual arts (General) For photography, see TR (1)
  - ND Painting (1)
  - NE Print media (14)
  - NX Arts in general (1)
- P Language and Literature (128)
  - P Philology. Linguistics (115)
    - Language Acquisition (8)
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    - Computational linguistics. Natural language processing (76)
    - Semiotics (9)
      - Language. Linguistic theory (9)
        Gesture. Sign language (7)
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    - Chinese Language (1)
  - PK Indo-Iranian (7)
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    - PN2000 Dramatic representation. The Theater (1)
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      - Press (2)
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    - Travel Writing (1)
  - PL Languages and literatures of Eastern Asia, Africa, Oceania (3)
    - Dravidian Languages (2)
- Q Science (2878)
  - Q Science (General) (392)
    - Research (4)
      - Research--Equipment and Supplies (3)
        Scientific apparatus and instruments (3)
        Physical instruments (3)
        Detectors (3)
        Remote sensing (3)
        Electronic surveillance (3)
        Video surveillance (1)
    - Self-organizing systems. Conscious automata (389)
      - Artificial intelligence (43)
        Computer vision (5)
      - Machine learning (361)
  - QA Mathematics (2759)
    - Multimedia Systems (4)
    - Problem Solving Theory (1)
    - Algebra (50)
      - Algorithms (50)
        Computer algorithms (49)
        Machine theory (1)
        Robotics (1)
    - Computer software (1488)
      - Computer Security (407)
        Database security (8)
        Blockchains (Databases) (7)
      - File Sharing (2)
      - Mobile Phone Applications (176)
        Online dating (2)
      - Website Design (57)
    - Electronic computers. Computer science (2592)
      - Computer Systems (45)
        Computers (11)
        Electronic data processing (11)
        Programming languages (8)
        Information Storage and Retrieval Systems (26)
        Management Information Systems (8)
        Decision Support Systems (2)
      - Non Linear Programming (1)
    - Probabilities (3)
  - QB Astronomy (11)
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  - QH Natural history (49)
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        Data processing. Bioinformatics (44)
        Artificial intelligence (43)
        Computer vision (5)
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    - Nutrition (15)
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    - QR355 Virology (1)
  - Life sciences (100)
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      - Pathology (92)
        Tumors (92)
        Cancer (88)
- R Medicine (613)
  - Healthcare Industry (198)
  - R Medicine (General) (45)
  - RA Public aspects of medicine (241)
    - Public Health System (17)
    - RA0421 Public health. Hygiene. Preventive Medicine (65)
      - Alchohol Use (2)
      - Personal Health and Hygiene (38)
        Stress Management (11)
    - RA790 Mental Health (159)
  - RB Pathology (9)
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    - RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry (71)
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  - RS Pharmacy and materia medica (15)
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  - Diseases (18)
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      - Developmental disabilities (6)
    - Outbreaks of disease (6)
      - Epidemics (6)
        COVID-19 Pandemic, 2020- (6)
- S Agriculture (37)
  - S Agriculture (General) (13)
    - Farming Industry (6)
  - SB Plant culture (15)
  - SD Forestry (1)
  - SF Animal culture (5)
    - Horses (5)
      - Horse Sport (5)
        Horse Racing (4)
  - SH Aquaculture. Fisheries. Angling (3)
- T Technology (3061)
  - T Technology (General) (2874)
    - T201 Patents. Trademarks (2)
    - Information Technology (2861)
      - Cloud computing (353)
      - Computer software (1488)
        Computer Security (407)
        Database security (8)
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        File Sharing (2)
        Mobile Phone Applications (176)
        Online dating (2)
        Website Design (57)
      - Electronic computers. Computer science (2592)
        Computer Systems (45)
        Computers (11)
        Electronic data processing (11)
        Programming languages (8)
        Information Storage and Retrieval Systems (26)
        Management Information Systems (8)
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        Non Linear Programming (1)
      - Fintech (29)
  - TA Engineering (General). Civil engineering (General) (11)
    - Systems engineering (5)
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  - TC Hydraulic engineering. Ocean engineering (1)
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        Website Design (57)
    - Biometric Identification (4)
  - TL Motor vehicles. Aeronautics. Astronautics (41)
    - Motorcycles (1)
  - TR Photography (11)
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  - Biomedical engineering (23)
- U Military Science (3)
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    - Defence Forces (2)
- V Naval Science (1)
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- Z Bibliography. Library Science. Information Resources (422)
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  - ZA Information resources (412)
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      - Databases (7)
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    - ZA4150 Computer Network Resources (395)
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        Online Shopping (23)
        Websites (290)
        Online social networks (206)
        Web logs. Blogs. (10)
        Website Design (57)
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    - Research (4)
      - Research--Equipment and Supplies (3)
        Scientific apparatus and instruments (3)
        Physical instruments (3)
        Detectors (3)
        Remote sensing (3)
        Electronic surveillance (3)
        Video surveillance (1)
- A General Works (2)
  - AS Academies and learned societies (General) (1)
  - AZ History of Scholarship The Humanities (1)