There are more than 250 million vehicles in the United States and most are sitting idle 22 hours a day. Through their peer-to-peer automobile sharing community, the folks at Getaround aim to solve this car overpopulation problem, reducing not just the number of vehicles on the planet but bothersome traffic and dangerous pollution as well.

Air travel is, by necessity, a jargon-filled industry. There are countless technical abbreviations used by pilots, airline officials and aviation geeks, but the lingo used in frequent flyer programs can be equally overwhelming. The dozens and dozens of programs out there tend to each have their own way of approaching these terms.