  In this paper, we consider the quantum area spectrum for a rotating and
charged (Kerr-Newman) black hole. Generalizing a recent study on Kerr black
holes (which was inspired by the static-black hole formalism of Barvinsky, Das
and Kunstatter), we show that the quantized area operator can be expressed in
terms of three quantum numbers (roughly related to the mass, charge and spin
sectors). More precisely, we find that $A=8\pi\hbar[n+{1\over 2}+{p_1\over
2}+p_2]$, where $n$, $p_1$ and $p_2$ are strictly non-negative integers. In
this way, we are able to confirm a uniformly spaced spectrum even for a fully
general Kerr-Newman black hole. Along the way, we derive certain selection
rules and use these to demonstrate that, in spite of appearances, the charge
and spin spectra are not completely independent.
