The heart of the WHCF is its Subject File. It contains information on nearly everything and everyone associated with the Ford administration. Sixty basic subject categories divide into over 1,000 subcategories using alphanumeric file codes, e.g. CO-Countries has a subcategory CO 75 Japan, and FI-Finance has a subcategory FI 4 Budget-Appropriations. Generally higher level materials are in yellow-labeled "Executive" folders, while samples of public opinion mail and similarly routine materials are in green-labeled "General" folders. Click on the names of the primary Subject File categories below to see detailed finding aids describing each of the subcategories.