elem-stacked+elem+diagram.tex

\documentclass[border=10pt]{standalone}
% arr: reindent
\usepackage{tikz}
\usetikzlibrary{shapes.multipart}

\begin{document}

\begin{tikzpicture}
	[
		stack/.style={rectangle split, 
			rectangle split parts=#1,
			draw, 
			anchor=center}
	]

	\node[stack=5]  {
		\nodepart{two}a
		\nodepart{three}b
		\nodepart{four}c
		\nodepart{five}d
	};
\end{tikzpicture}

\end{document}