PPI (Producer price indexes) -- See Wholesale price indexes Here are entered works on the construction of wholesale price indexes as well as the indexes themselves. In the latter case, a subject entry is also made under the heading Prices--[local subdivision].
PPOs (Medical care) -- See Preferred provider organizations (Medical care) Here are entered works on associations or organizations of physicians and hospitals that contract with employers or insurers to provide comprehensive health care services to subscribers on a fee-for-service basis.
PR (Public relations) -- See Public relations Here are entered general works on the actions of organizations, such as corporations, stores, governments, etc., in promoting good will between themselves and the community. Works on the process of disseminating information in order to attract public notice are entered under Publicity. --subdivision Public relations under names of individual corporate bodies and under topical headings, e.g. Boy Scouts--Public relations; United States. Army--Public relations