This document summarizes three testbeds being developed as part of the DIATOMIC project funded by the European Union's Horizon 2020 program. The three testbeds focus on health, agrifood, and manufacturing. Each testbed utilizes modular components that can be replaced or added to and interfaces between components are programmed through APIs. The health testbed involves remote patient monitoring using biometric sensors. The agrifood testbed focuses on optimizing natural resource use in agriculture through sensors, cloud platforms, and apps. The manufacturing testbed explores customized 3D printing for individualized products using automated cyber-physical production systems.