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.
What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.