Description and travel 411,122 Diplomatic relations 130,414 Diseases 114,079 Doctrines 103,766 Data processing 76,643 Dictionaries 70,663 Democracy 63,675 Design and construction 62,582 Drama 59,237 Dialects 53,008 Death 42,905 Directories 37,924 Discovery and exploration 36,211 Design 32,460 Documentary films 28,172 Drugs 27,051 Diagnosis 26,435 Dwellings 26,294 Development 24,972 Decision making 24,964 Defenses 23,797 Debts, Public 21,691 Dance 21,680 Drawing 19,772 Discoveries in geography 18,780 Drug abuse 18,036 Death and burial 17,476 Dance music 17,474 Decoration and ornament 16,282 Discourse analysis 15,276 Dogs 15,155 Diseases and pests 14,918 Designs and plans 14,689 Droit 14,553 Decorative arts 14,495 Diaries 14,285 Divorce 13,986 Disaster relief 13,912 Domestic relations 13,625 Database management 12,910 Digital techniques 11,792 Discipline 11,787 Diplomats 11,711 Discrimination in employment 11,267 Drug control 11,043 Data mining 10,946 Dance orchestra music 10,898 Diet 10,726 Dissenters, Religious 10,559 Data protection 10,059 Dissertations, Academic 10,055 Decoration and ornament, Architectural 9,961 Drug traffic 9,658 Demography 9,562 Detective and mystery stories 9,407 Descriptions et voyages 9,274 Democratization 9,270 Doctrinal and controversial works 9,009 Dreams 8,917 Decentralization in government 8,874 Dentistry 8,823 Databases 8,661 Defense contracts 8,578 Debtor and creditor 8,552 Diplomatic history 8,527 Delivery of Health Care 8,478 Disarmament 8,251 Dissertations 8,069 Differential equations 7,405 Dialectical materialism 7,384 Drug use 7,294 Disasters 7,212 Discrimination 7,173 Documentary photography 7,134 Debts, External 6,975 Dams 6,876 Dispute resolution (Law) 6,800 Digital media 6,747 Draft 6,668 Deeds 6,601 Damages 6,525 Diplomatic and consular service 6,395 Devotional literature 6,216 Discrimination & Race Relations 6,178 Defense industries 6,113 Diplomacy 6,095 Differential equations, Partial 6,076 Debt 5,965 Dynamics 5,960 Développement 5,899 Depressions 5,807 Diabetes 5,668 Dutch language 5,653 Dissenters 5,519 Details 5,447 Dutch 5,310 Divination 5,180 Deaf 5,169 Demonstrations 5,145 Demonology 5,022