Operas 63 Musicals 40 Pantomimes with music 17 Ballad operas 5 Oratorios 5 History 3 Masques with music 3 Anniversaries, etc 2 Ballets 2 Foreign relations 2 Pantomimes 2 Pastoral music (Secular) 2 Administrative agencies 1 Aeroassist 1 Aerospace vehicles 1 Algorithms 1 Alternatives to imprisonment 1 Apartheid 1 Campaigns 1 Care 1 Catholic Theology 1 Cherokee Indians 1 Child care services 1 Children of military personnel 1 Classifications 1 Computational fluid dynamics 1 Computer pograms 1 Conservation equations 1 Conservation laws 1 Control-theory 1 Criminal justice, Administration of 1 Defects 1 Education 1 Education, Humanistic 1 Error detection codes 1 Fault tolerance 1 Finance 1 Flow distribution 1 Generals 1 Government purchasing 1 Government relations 1 Gregorian chants 1 Gunpowder Plot, 1605 1 Information technology 1 Instruction and study 1 Low speed stability 1 Manuscripts 1 Mathematical models 1 Military dependents 1 Missionaries 1 more ...