The crossword solutions for the term 'Drain of Strength' are SAP, which stands for System Analysis and Program Development. SAP is a software company that specializes in enterprise resource planning (ERP) software. It is one of the largest software companies in the world and provides business solutions to organizations of all sizes. SAP's software helps businesses manage their finances, operations, and customer relationships. SAP's software also helps organizations analyze data and make decisions based on the insights they gain.