The Miltary for sure.
I used to give an example to my Navy peers by saying "The DCA, who was the EOOW told the MPA that the DOC in the DFT put it OOC, the MPA told the CHENG and he told the OOD who passed it on to the CO.".
To my peers, that sentence made perfect sense, but is unintelligible to anyone outside Navy Steam Propulsion.
I remember sending a missive to my CO and realized that there were no words in it.