The term "digital twin" has been popping up a lot lately. Serious deja vu . I recall it being used years ago in engineering, manufacturing and academic circles, but not the popular press. Not back then. Curious . Is there a DT rebirth going on? Apparently so... Source: Google Trends According to NetworkWorld... A digital twin is a digital representation of a physical object or system. The technology behind digital twins has expanded to include large items such as buildings, factories and even cities, and some have said people and processes can have digital twins, expanding the concept even further. The idea first arose at NASA: full-scale mockups of early space capsules, used on the ground to mirror and diagnose problems in orbit, eventually gave way to fully digital simulations. But the term really took off after Gartner named digital twins as one of its top 10 strategic technology trends for 2017 saying that within three to five years, “billions