Concentrated (or Confined) Animal Feeding Operation, also known as a 'factory farm'. In industry/government publications, CAFO will usually signify "Concentrated". Many non-industrial organic farmers and animal rights advocates prefer "Confined" as a more accurate adjective for the term CAFO. A quoted Google query for each variant reveals that "concentrated" outnumbers "confined" approximately 6-to-1 in search results.
Traditional organic farmers often oppose the arrival of CAFOs and factory farms in their areas.