IMO, it's important to have some self-discipline when using words like ground, common, return, and related. Sloppy use of these words easily leds to sloppy thinking and then sloppy designs. Plus, even if you are 100% clear in your mind, maybe the person to whom you are speaking (or emailing) is not--and may choose/use the wrong one. So watch your words, both spoken and in print, on schematics, and labels.
Drones are, in essence, flying autonomous vehicles. Pros and cons surrounding drones today might well foreshadow the debate over the development of self-driving cars. In the context of a strongly regulated aviation industry, "self-flying" drones pose a fresh challenge. How safe is it to fly drones in different environments? Should drones be required for visual line of sight – as are piloted airplanes? Join EE Times' Junko Yoshida as she moderates a panel of drone experts.