Commitments of Traders (COTs)
The Commitments of Traders (COT) reports provide a breakdown of each Tuesday’s open interest for market reports, in which 20 or more traders hold positions equal to or above the reporting levels established by the CFTC. 
In the traditional COT report, traders are separated into three categories under two broad classifications: nonreportable and reportable. "Nonreportable" traders are small speculators whose positions fall short of CFTC reporting thresholds. "Reportable" traders hold positions large enough that they are required to report to the CFTC daily.
Reportable traders are further split into either "commercial" or "noncommercial" designations:
On September 4, 2009, the CFTC started publishing a new Disaggregated Commitments of Traders report, in which positions in 22 physical commodities are split into four categories: Producer/Merchant/Processor/User; Swap Dealers; Managed Money; and Other Reportables.