\documentclass[a4paper]{scrartcl}
\usepackage[german]{babel}

\begin{document}

\begin{itemize}
\item Computer Modern Roman {\rmfamily
    \begin{itemize}
    \item medium {\mdseries
        \begin{itemize}
        \item upright: \textup{the quick brown fox}
        \item italic: \textit{the quick brown fox}
        \item slanted: \textsl{the quick brown fox}
        \item small caps: \textsc{the quick brown fox}
        \end{itemize} }
    \item bold {\bfseries
        \begin{itemize}
        \item upright: \textup{the quick brown fox}
        \item italic: \textit{the quick brown fox}
        \item slanted: \textsl{the quick brown fox}
        \item small caps: \textsc{the quick brown fox}
        \end{itemize} }
    \end{itemize} }
\item Computer Modern Sans
\item Computer Modern Typewriter
\end{itemize}

\end{document}
