Oracle is the second-largest software maker by revenue, after Microsoft.The company specializes in developing and marketing computer hardware systems and enterprise software products – particularly its own brands of database management systems. The company also builds tools for database development and systems of middle-tier software, enterprise resource planning (ERP) software, customer relationship management (CRM) software and supply chain management (SCM) software.
Founded in 1975, Microsoft is the worldwide leader in software, services, devices and solutions that help people and businesses realize their full potential.Its best known software products are the Microsoft Windows line of operating systems, Microsoft Office office suite, and Internet Explorer web browser.. It is the world's largest software maker measured by revenues. It is also one of the world's most valuable companies.