\documentclass[tikz, border=10pt]{standalone}

\usetikzlibrary{shapes}

\begin{document}

\begin{tikzpicture}[every node/.append style={draw, rounded corners, inner sep=10pt}]

    \node [rectangle split, rectangle split horizontal, rectangle split parts=3]

        {Services

         \nodepart{two} Event Driven Framework

         \nodepart{three} OS Adapter Layer};

\end{tikzpicture}

\end{document}