It's not surprising, then, that recent reports show that cabin modifications, especially those that favor upper-class travelers, are the fastest-growing segment of the airline MRO (maintenance, repair and overhaul) industry.

CNN: Amazing first-class air cabins

Now, the auto repair and maintenance industry is using social media to overhaul its Millennial outreach strategies.

FORBES: Does It Matter If Millennials Don't Know How Cars Work?