NIST Special Publication 1900-202 on CPS and IoT

There has historically been uncertainty about the relationship between CPS and IoT, which has hindered close interaction and communication across the respective communities. This document describes the origins of these terms, analyzes the range of definitions over time, and describes a unified perspective that clarifies that relationship and reduces uncertainty to promote a common basis for working together -- exchanging best practices and ideas, pursuing shared goals, avoiding duplication of effort, reducing the proliferation of conflicting standards, and catalyzing discovery and innovation.

You can access the special publication here.