SAP was founded in 1972 by 5 German engineers as a company specializing in enterprise resource planning (ERP) software. ERP systems integrate various business functions like finance, sales, human resources, manufacturing and project management to share data across the entire enterprise. SAP has evolved from mainframe to client server systems and is now a modular and integrated ERP solution, with core modules like finance, sales and distribution that share data and automatically create transactions between different business functions.