The "Demand for IT Networking Professionals in the USA" infographic illustrates how technology is driving the demand for networking skills and experience, current opportunities and the effects of training and certifications. #infographic #ITdemand
Chicago, Illinois. Conductor handling engineer copy of train orders before a Chicago and Northwestern Railroad freight train pulls out for Clinton, Iowa. Since the track between those points is under automatic train control, the engineer, in turn, hands the conductor the key to the automatic train control lock of the engine. The conductor will keep the key in the caboose until the train arrives at its destination. Photo taken by Jack Delano, January 1943.