Axioms Differential equations, Partial Fiction Geometry Geometry -- Instructional exposition (textbooks, tutorial papers, etc.) Geometry -- Real and complex geometry -- Euclidean geometries (general) and generalizations Geometry -- Real and complex geometry -- Hyperbolic and elliptic geometries (general) and generalizations Integral equations Mathematical physics World War, 1939-1945 Commutative rings Education Education and state Educational change Electronic data processing Feature writing Gas engineering Gas fields Gas reservoirs Gas wells Oil wells Production methods Secret service Testing Topological manifolds Web servers