\documentclass{jarticle}

\begin{document}
\section{itemize}
\begin{itemize}
\item ITEM 1
\item ITEM 2
\end{itemize}

\section{enumerate}
\begin{enumerate}
\item ITEM 1
\item ITEM 2
\end{enumerate}

\section{description}
\begin{description}
\item[GUI]
graphical user interface
\item[CUI]
character user interface
\end{description}

\section{table A}
\begin{tabular}{lcr}
left & center & right \\ \hline
a & b & c \\
\multicolumn{2}{c}d & e \\
\end{tabular}

\section{table B}
\begin{table}[h]
\caption{TABLE}
\begin{center}
\begin{tabular}{|l|c|r|} \hline
left & center & right \\ \hline
a & b & c \\ \hline
\multicolumn{2}{|c|}d & e \\ \hline
\end{tabular}
\end{center}
\end{table}

\end{document}