Dell EMC (EMC Corporation until 2016) is an American multinational corporation headquartered in Hopkinton, Massachusetts, United States. Dell EMC sells data storage, information security, virtualization, analytics, cloud computing and other products and services that enable organizations to store, manage, protect, and analyze data. Dell EMC's target markets include large companies and small- and medium-sized businesses across various vertical markets. The company's stock (as EMC Corporation) was added to the New York Stock Exchange on April 6, 1986, and was also listed on the S&P 500 index. Source: https://en.wikipedia.org/wiki/Dell_EMC

McAfee is a global organization with a 30-year history and a brand known the world over for innovation, collaboration and trust. The company was founded in 1987 as McAfee Associates, named for its founder John McAfee, who resigned from the company in 1994.
As a leading-edge cybersecurity company, McAfee provides advanced security solutions to consumers, small and large businesses, enterprises, and governments. Security technologies from McAfee use a unique, predictive capability that is powered by McAfee Global Threat Intelligence, which enables home users and businesses to stay one step ahead of the next wave of fileless attacks, viruses, malware, and other online threats. McAfee is: ■ 622 million total endpoints
■ 97 million enterprise endpoints
■ 525 million consumer endpoints
■ 69,000 enterprise customers
■ 7,000 employees
■ 189 countries
■ 151 Security Innovation Alliance partners
■ 80% of Fortune 100 firms
■ 75% of Fortune 500 firms
■ 64% of Global 2000 firms
■ 87% of world’s largest banks
■ 54% of Top 50 retailers
■ 1,550+ security patents worldwide

Microsoft Corporation is an multinational technology company headquartered in Redmond, Washington, that 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. Its flagship hardware products are the Xbox video game consoles and the Microsoft Surface tablet lineup. As of 2011, it was the world's largest software maker by revenue, and one of the world's most valuable companies.