\end{center}
-\underline{Random variables} are central to any model of a random
-process, but their mathematical definition is unclear to most. This is
-an attempt at giving an intuitive understanding of their definition
-and utility.
+\underline{Random variables} (RVs) are central to any model of a
+random phenomenon, but their mathematical definition is unclear to
+most. This is an attempt at giving an intuitive understanding of their
+definition and utility.
\section{Modeling randomness}