The OTS (“Office of Thrift Supervision”) is a United States Treasury Department office that oversees “savings and loans”, particularly those involved in real estate mortgages. The OTS examines each member institution every 12-to-18 months to assess the institution’s safety and soundness. In that role, it behaves much like the FDIC does with federally chartered banks.
The OTS’s official web site is www.ots.treas.gov.
See also: “FFIEC” (umbrella regulation, including state chartered banks), “FDIC” (federally chartered banks), “the Fed” (U.S. central bank), “NCUA” (credit unions) and “OCC” (national and foreign banks).