  The well-known equation for hydrostatic equilibrium in a static spherically
symmetric spacetime supported by an isotropic perfect fluid is referred to as
the Oppenheimer-Volkoff (OV) equation or the Tolman-Oppenheimer-Volkoff (TOV)
equation in various General Relativity textbooks or research papers. We
scrutinize the relevant original publications to argue that the former is the
more appropriate terminology.
