Description and travel 411,441 Diplomatic relations 130,581 Diseases 114,067 Doctrines 103,760 Data processing 76,569 Dictionaries 70,613 Democracy 63,620 Design and construction 62,549 Drama 59,202 Dialects 53,001 Death 42,907 Directories 37,919 Discovery and exploration 36,274 Design 32,464 Documentary films 28,169 Drugs 27,050 Diagnosis 26,432 Dwellings 26,283 Development 24,958 Decision making 24,954 Defenses 23,803 Debts, Public 21,710 Dance 21,675 Drawing 19,762 Discoveries in geography 18,787 Drug abuse 18,029 Death and burial 17,645 Dance music 17,475 Decoration and ornament 16,281 Discourse analysis 15,263 Dogs 15,144 Diseases and pests 14,917 Designs and plans 14,686 Droit 14,528 Decorative arts 14,483 Diaries 14,293 Divorce 13,969 Disaster relief 13,912 Domestic relations 13,608 Database management 12,900 Discipline 11,786 Digital techniques 11,775 Diplomats 11,700 Discrimination in employment 11,238 Drug control 11,041 Data mining 10,935 Dance orchestra music 10,898 Diet 10,732 Dissenters, Religious 10,564 Dissertations, Academic 10,053 Data protection 10,034 Decoration and ornament, Architectural 9,959 Drug traffic 9,657 Demography 9,558 Detective and mystery stories 9,406 Democratization 9,258 Descriptions et voyages 9,219 Doctrinal and controversial works 9,022 Dreams 8,913 Decentralization in government 8,869 Dentistry 8,824 Databases 8,660 Defense contracts 8,576 Debtor and creditor 8,548 Diplomatic history 8,519 Delivery of Health Care 8,476 Disarmament 8,247 Dissertations 8,067 Differential equations 7,408 Dialectical materialism 7,384 Drug use 7,291 Disasters 7,211 Discrimination 7,159 Documentary photography 7,128 Debts, External 6,972 Dams 6,873 Dispute resolution (Law) 6,787 Digital media 6,737 Draft 6,667 Deeds 6,599 Damages 6,520 Diplomatic and consular service 6,398 Devotional literature 6,215 Discrimination & Race Relations 6,176 Defense industries 6,110 Diplomacy 6,093 Differential equations, Partial 6,074 Debt 5,964 Dynamics 5,953 Développement 5,897 Depressions 5,808 Diabetes 5,666 Dutch language 5,653 Dissenters 5,513 Details 5,444 Dutch 5,309 Divination 5,181 Deaf 5,166 Demonstrations 5,143 Demonology 5,021