graphics
`
\documentclass{standalone}
\usepackage{tikz}
\usetikzlibrary{shapes,arrows,positioning}
\begin{document}
\begin{tikzpicture}
\tikzset{main node/.style={rectangle, draw,
text centered, rounded corners}, }
\tikzset{main verb/.style={minimum size=1cm}, }
\tikzset{linea/.style={-triangle 90}, }
\node[main node] (a) {GRAPHICS};
\node[main node] (b) [above right =of a] {GRAPHICS.CFG};
\node[main node] (c)
{PDFTEX.DEF};
\node[main node] (d) [below =of a] {TRIG};
\node[main node] (e) [below =of c] {SUPP-PDF.MKII};
\node[main node] (1)
{EPSTOPDF-BASE};
\node[main node] (3) [ right =of 1] {INFWARERR};
\node[main node] (4) [above right =of 1] {GRFEXT};
\node[main node] (5) [below right =of 1] {PDFTEXCMDS};
\node[main node] (6) [above =of 1] {KVOPTIONS};
\node[main node] (7) [above right=of 6] {KEYVAL};
\node[main node] (8) [above =of 6] {KVSETKEYS};
\node[main node] (9) [above left=of 6] {ETEXCMDS};
\node[main node] (10)
{KVDEFINEKEYS};
\node[main node] (11)
{LTXCMDS};
\node[main node] (12)
{IFPDF};
%\node[main node] (12) [above =of 13] {PDFTEXCMDS};
\node[main node] (13) [below right =of 5] {IFLUATEX};
% \node[main node] (15) [below =of 14] {PDFTEXCMDS};
\node[main node] (f) [above left =of 1] {EPSTOPDF-SYS.CFG};
\foreach \x /\y in{1/3,1/4,1/5,1/6,6/7,6/8,6/9,4/10,10/11,5/3,5/11,5/12,5/13,a/b,a/c,a/d,b/1,b/5,c/5,c/3,c/e,1/f}
\path[linea] (\x) edge node {} (\y);
%%
\end{tikzpicture}
\end{document}
`