Armed Forces 68 Politics and government 52 Military policy 50 Mathematical models 47 International relations 37 Foreign relations 34 Medical care 27 more ... Costs 26 Economic aspects 26 Procurement 24 Economic conditions 23 National security 23 Recruiting, enlistment, etc 23 Health insurance 20 Data processing 19 Defenses 19 Evaluation 19 History 19 Research 19 Medicare 18 Personnel management 17 Terrorism 17 Airplanes, Military 16 Computer programs 16 Appropriations and expenditures 15 Computer simulation 15 Education 15 Government policy 15 Arms control 14 Economic policy 14 less ...