What is cot in CFTC?

Excuse me, could you kindly clarify what exactly "cot" stands for in the context of the Commodity Futures Trading Commission, or CFTC? Is it a specific terminology related to market regulation, or perhaps an acronym that designates a particular type of participant or instrument within the futures market? It would be greatly appreciated if you could elaborate on its meaning and its significance within the scope of the CFTC's functions and regulations.