Description and travel 411,405 Diplomatic relations 130,306 Diseases 114,324 Doctrines 103,903 Data processing 76,724 Dictionaries 70,662 Democracy 63,764 Design and construction 62,624 Drama 59,182 Dialects 53,043 Death 43,114 Directories 37,949 Discovery and exploration 36,233 Design 32,506 Documentary films 28,273 Drugs 27,063 Diagnosis 26,452 Dwellings 26,316 Debts, Public 26,197 Development 25,034 Decision making 24,994 Defenses 23,812 Dance 21,810 Drawing 19,780 Discoveries in geography 18,786 Drug abuse 18,030 Death and burial 17,499 Dance music 17,483 Decoration and ornament 16,292 Discourse analysis 15,289 Dogs 15,165 Diseases and pests 14,923 Designs and plans 14,694 Droit 14,659 Decorative arts 14,519 Diaries 14,310 Divorce 14,010 Disaster relief 13,918 Domestic relations 13,642 Database management 12,912 Digital techniques 11,801 Discipline 11,798 Diplomats 11,726 Discrimination in employment 11,272 Drug control 11,050 Data mining 10,955 Dance orchestra music 10,898 Debts, External 10,886 Diet 10,729 Dissenters, Religious 10,564 Debt 10,428 Demography 10,344 Data protection 10,071 Dissertations, Academic 10,057 Decoration and ornament, Architectural 9,967 Descriptions et voyages 9,933 Drug traffic 9,674 Detective and mystery stories 9,420 Democratization 9,280 Doctrinal and controversial works 9,014 Dreams 8,927 Decentralization in government 8,882 Dentistry 8,828 Databases 8,808 Defense contracts 8,580 Debtor and creditor 8,557 Diplomatic history 8,527 Delivery of Health Care 8,470 Disarmament 8,250 Dissertations 8,069 Depository Institutions 7,604 Differential equations 7,407 Dialectical materialism 7,386 Drug use 7,295 Disasters 7,220 Discrimination 7,182 Documentary photography 7,170 Dams 6,883 Dispute resolution (Law) 6,815 Digital media 6,764 Draft 6,670 Deeds 6,602 Damages 6,527 Diplomatic and consular service 6,394 Devotional literature 6,217 Discrimination & Race Relations 6,174 Defense industries 6,118 Diplomacy 6,092 Differential equations, Partial 6,076 Dynamics 5,963 Développement 5,900 Depressions 5,819 Debt Management 5,685 Diabetes 5,676 Dutch language 5,656 Dissenters 5,528 Details 5,452 Dutch 5,314 Divination 5,184 Deaf 5,172