\documentclass{standalone}

\usepackage{tikz}
\usepackage[sfdefault]{noto}

\usetikzlibrary{arrows.meta}
\usetikzlibrary{shadows}

\begin{document}

        \begin{tikzpicture}
                \tikzstyle{box} = [fill={rgb:black,1;white,5}, drop shadow=black, thick]
                \tikzstyle{arr} = [-{Latex[length=3mm]}]
                \draw [fill=white] (0,0) rectangle (10.5,6.5);
                \draw [box] (0.5,2) rectangle (2,5) node [align=center, text width=1.5cm] at (1.25, 3.5) {Steuer\-werk};
                \draw [box] (3,4.5) rectangle +(5,1) node [align=center, text width=1.5cm] at (5.5, 5) {Daten};
                \draw [box] (3,1) rectangle +(5,1) node [align=center, text width=1.5cm] at (5.5, 1.5) {Befehle};
                \foreach \x in {3,4,7} {
                        \draw [box] (\x,3) rectangle +(0.5,0.5);
                        \draw [arr] (\x+.25,2) -- +(0,1);
                        \draw [arr] (\x+.25,4.5) -- +(0,-1);
                }
                \node at (5.75,3.25) {\dots};
                \node [label=right:{Rechenwerke}] at (7.5, 3.25) {};
        \end{tikzpicture}

\end{document}