Algebra Data processing 3 Study and teaching (Secondary) 3 Study and teaching 2 Conjugacy classes 1 Distribution of decedents' estates (Islamic law) 1 Electronic data processing 1 Free products (Group theory) 1 Function algebras 1 Geographic information systems 1 Graphic methods 1 Group extensions (Mathematics) 1 Group theory 1 HNN-extensions 1 History 1 Inheritance and succession (Islamic law) 1 Islam and science 1 Keyboarding 1 Mappings (Mathematics) 1 Mathematical ability 1 Mathematical models 1 Mathematics 1 Matrices 1 Object-oriented programming (Computer science) 1 Problem solving 1 Problems, exercises, etc 1 School children 1 Spatial analysis (Statistics) 1 Study and teaching (Elementary) 1 Tensor products 1