Honeywell invents and manufactures technologies to address some of the world’s toughest challenges initiated by revolutionary macrotrends in science, technology and society. They improves business performance for customers with automation and control solutions, equipment and services that enhance safety, reliability and efficiency. Year founded: 1906 Revenue: $40.3 billion (2014) NYSE: HON

Emerson is a diversified global manufacturing company that brings technology and engineering together to provide innovative solutions to customers in the industrial, commercial and consumer markets through its Process Management, Industrial Automation, Network Power, Climate Technologies, and Commercial & Residential Solutions businesses. ​Year founded: 1890Revenue: $24.5 billion (2014)NYSE: EMR

Rockwell is a provider of industrial automation power, control and information solutions that helps manufacturers achieve a competitive advantage for their businesses. Rockwell operates in two segments: Architecture & Software, which deals in hardware, software and communication components of the organization, and Controls Products & Solutions that handles a portfolio of intelligent motor control and industrial control products, application expertise and project management capabilities.