CONEX containers are one of the most iconic developments in the history of transportation and logistics, as they revolutionized the shipping industry.
These containers gave rise to the industrial intermodal standard containers known today as TEU and FEU.
Intermodal containers can be transported using the road, rail and maritime methods. In certain cases, they can also be transported by air, when the airplane stowage systems are modified to accommodate their specific dimensions.
The term CONEX...
https://www.marineinsight.com/guidelines/conex-containers-history-dimensions-features-and-uses/