SAP is the world's largest business software company, founded in 1972 in Germany. It moved its headquarters to Walldorf in 1976. Henning Kagermann became sole CEO in 2003. SAP operates globally and offers various enterprise software products, including solutions for enterprise resource planning, customer relationship management, supply chain management, and human capital management. The company's software uses 3-tier architecture and technologies like RFCs, BAPIs, and IDocs to interface between applications and databases.