IBM is an American multinational technology and consulting corporation that manufactures and markets computer hardware, middleware, and software, and offers infrastructure, hosting, and consulting services in areas ranging from mainframe computers to nanotechnology. IBM is intent on leading the development of a global data field.

Microsoft develops, manufactures, licenses, supports and sells computer software, consumer electronics and personal computers and services. Its best known software products are the Microsoft Windows line of operating systems, Microsoft Office office suite, and Internet Explorer and Edge web browsers.Year Founded: 1975Revenue: $93.6 billion (2014)NASDAQ: MSFT

Oracle is a leader in enterprise software and provides hardware and services to help companies improve their processes. Best known for its focus on databases, it offers aid in areas such as managing business data, collaboration and application development, customer relationship management, and supply chain management. Year founded; 1977 Revenue: $38.2 billion (2015) NYSE: ORCL

VMware is a software company providing cloud and virtualization services that powers complex digital infrastructure. The company accelerates digital transformation by enabling unprecedented freedom and flexibility in how its customers build and evolve IT environments. Its software helps business users simply and securely access the apps and data they need, from anywhere, to do their best work. The company's software spans compute, cloud, networking and security, and digital workspace.