  The content of a polynomial over a ring $R$ is a well understood notion. Ohm
and Rush generalized this concept of a content map to an arbitrary ring
extension of $R$, although it can behave quite badly. We examine five
properties an algebra may have with respect to this function -- content
algebra, weak content algebra, semicontent algebra (our own definition),
Gaussian algebra, and Ohm-Rush algebra. We show that the Gaussian, weak
content, and semicontent algebra properties are all transitive. However,
transitivity is unknown for the content algebra property. We then compare the
Ohm-Rush notion with the more usual notion of content in the power series
context. We show that many of the given properties coincide for the power
series extension map over a valuation ring of finite dimension, and that they
are equivalent to the value group being order-isomorphic to the integers or the
reals. Along the way, we give a new characterization of Pr\"ufer domains.
