The document discusses the evolving definitions and scope of public administration as a field. It explores three meanings of "public" - as government, as provider of public goods/services, and as governance for the public interest. It argues voluntary/non-profit sector organizations exhibit both public and private characteristics, existing along a continuum of publicness to privateness. While having private initiative and funding, their role in advocacy and provision of indivisible goods means they also serve the public interest. As such, the management of voluntary organizations can rightly have a place within public administration.