Logics, Theories, and Decision Procedures I -- A Comprehensive Framework for Combined Decision Procedures -- Connecting Many-Sorted Structures and Theories Through Adjoint Functions -- Combining Data Structures with Nonstably Infinite Theories Using Many-Sorted Logic -- On a Rewriting Approach to Satisfiability Procedures: Extension, Combination of Theories and an Experimental Appraisal -- Inteā¦