Mom didn't like the expansion '(operating system)es'.
agnostic, but those packages depend on more fundamental packages that
control the physical hardware in use\citep{pyafm}. At the bottom of
the physical-interface stack are the \Comedi\ drivers from the Linux
-kernel\citep{comedi}. Users running other OSes should be able to swap
-in analogous low level physical-interface packages if Linux is not an
-option. \nomenclature{OS}{Operating system}
+kernel\citep{comedi}. Users running other operating systems should be
+able to swap in analogous low level physical-interface packages if
+Linux is not an option.
+%
+\nomenclature{OS}{Operating system}
\end{abstract}