Armed Forces 174 Mathematical models 131 Housing subsidies 130 Military policy 95 Data processing 73 Foreign relations 62 Medical care 57 meer ... Politics and government 57 Economic aspects 54 Economic conditions 53 Defenses 50 Evaluation 49 Costs 47 Housing 46 International relations 45 Personnel management 44 Finance 40 Procurement 40 Recruiting, enlistment, etc 40 Research 40 Strategy 40 Computer programs 37 War games 37 Education 36 History 36 Computer simulation 35 Health insurance 33 Maintenance and repair 32 Prevention 32 Teachers 31 minder ...