IxD
n.— «Interaction design is a sub-discipline of design which examines the role of embedded behaviors and intelligence in physical and virtual spaces as well as the convergence of physical and digital products. Sometimes referred to by the acronyms “IxD” or “iD,” interaction design has recently developed as a field of study in a growing number of universities throughout the world.» —“Activate the park!” Canadian Architect (Toronto, Canada) Mar. 28, 2006. (source: Double-Tongued Dictionary)
Further reading
Mary Beth in Greenville, South Carolina, wonders: Why do we say four-oh-nine for the number 409 instead of four-zero-nine or four-aught-nine? What are the rules for saying either zero or oh or aught or ought to indicate that arithmetical symbol...
Astronauts returning from space say they experience what’s called the overview effect, a new understanding of the fragility of our planet and our need to reflect on what humans all share as a species. A book about the end of the universe...