%Version Aug 93    cgl@risc1.rug.nl
\noindent
       \setlength{\unitlength}{3.8ex}
\begin{picture}(14,15.6)(-.5, -2.5)
%1st column
\put(1, 0){\line(0, 1){1.5}}
\put(1, 2){\oval(2, 1)}
\put(1, 2){\makebox(0, 0){\texttt{.pk}}}
\put(1, 4){\vector(0, -1){1.5}}
\put(-.5, 4){\framebox(3, 1){METAfont}}
\put(1, 6.5){\vector(0, -1){1.5}}
\put(1,7){\oval(2, 1)}
\put(1, 7){\makebox(0, 0){\texttt{.mf}}}
%second column
\put(7.5, -.5){\framebox(2, 1){driver}}
\put(9.75, .75){\line(-1, 0){1.25}}
\put(9.75, .75){\line( 0, -1){.5}}
\put(9.75, .25){\line(-1, 0){.25}}
\put(9.85, .23){{\tiny \texttt{dvips}}}
\put(10, 1){\line(-1, 0){1.25}}
\put(10, 1){\line( 0, -1){.5}}
\put(10, .5){\line(-1, 0){.25}}
\put(8.75, 1){\line( 0, -1){.25}}
\put(10.1, .63){{\tiny \texttt{xdvi}}}
\put(10.1, 1.1){\hbox{.}\kern.1ex\raise.5ex\hbox{.}\kern.1ex\raise1ex\hbox{.}}
\put(8.5, 1.5){\vector(0, -1){1}}
\put(8.5, 2){\oval(2, 1)}
\put(8.5, 2){\makebox(0, 0){\texttt{.dvi}}}
\put(8.5, 4){\vector(0, -1){1.5}}
\put(7.5, 4){\framebox(2, 1){\TeX}}
%Plain
\put(9.75, 5.25){\line(-1, 0){1.25}}
\put(9.75, 5.25){\line( 0, -1){.5}}
\put(9.75, 4.75){\line(-1, 0){.25}}
\put(9.8, 4.68){{\tiny Plain}}
%LaTeX
\put(10, 5.5){\line(-1, 0){1.25}}
\put(10, 5.5){\line( 0, -1){.5}}
\put(10, 5){\line(-1, 0){.25}}
\put(8.75, 5.5){\line( 0, -1){.25}}
\put(10.1, 4.95){{\tiny \LaTeXe}}
\put(10.25, 5.75){\line(-1, 0){1.25}}
\put(10.25, 5.75){\line( 0, -1){.5}}
\put(10.25, 5.25){\line(-1, 0){.25}}
\put(9, 5.75){\line( 0, -1){.25}}
\put(10.35, 5.4){{\tiny AMS-Package}}
%
\put(10.35, 5.85){\hbox{.}\kern.1ex
\raise.5ex\hbox{.}\kern.1ex\raise1ex\hbox{.}}
%
\put(8.5, 6.5){\vector(0, -1){1.5}}
\put(8.5, 7){\oval(2, 1)}
\put(8.5, 7){\makebox(0, 0){\texttt{.tex}}}
%
\multiput(8.5, 9)(0, -.415){3}{\line(0, -1){.25}}
\put(8.5, 8.7){\vector(0, 1){.3}}
\put(8.5, 7.8){\vector(0, -1){.3}}
\put(7.5, 9){\framebox(2, 1){editor}}
%Spelling checker
\put(9.75, 10.25){\line(-1, 0){1.25}}
\put(9.75, 10.25){\line( 0, -1){.5}}
\put(9.75, 9.75){\line(-1, 0){.25}}
\put(9.85, 9.75){{\tiny \texttt{emacs}}}
%Style checker
\put(10, 10.5){\line(-1, 0){1.25}}
\put(10, 10.5){\line( 0, -1){.5}}
\put(10, 10){\line(-1, 0){.25}}
\put(8.75, 10.5){\line( 0, -1){.25}}
\put(10.1, 10){{\tiny \texttt{ispell}}}
%
\put(10.1, 10.6){\hbox{.}\kern.1ex
\raise.5ex\hbox{.}\kern.1ex\raise1ex\hbox{.}}
%
\put(8.5, 11.5){\vector(0, -1){1.5}}
\put(8.5, 12){\oval(2, 1)}
\put(8.5, 12){\makebox(0, 0){copy}}
%basis
\put(1, 0){\vector(1, 0){6.5}}
\put(9.5, 0){\vector(1, 0){2}}
\put(11.5, -.75){\framebox(2, 1.5){}}
\put(11.70, -.4){\shortstack{\small printer\\\small screen}}
%middle
\multiput(5, 5.25)(0, 1){3}{\line(0,1){.5}}
\multiput(5,  .25)(0, 1){4}{\line(0,1){.5}}
\multiput(5, -1.75)(0, 1.3){2}{\line(0,1){.2}}
%
\put(3.5, -1.250){\dashbox{.25}(3, .5){{\tiny \textsc{PostScript}}}}
\multiput(6.5, -1)(.45, 0){4}{\line(1,0){.25}}
\put(8.5, -1){\line( -1, 0){.2}}
%
\put(8.5, -1){\vector(0, 1){.5}}
\put(2.5, 4.5){\vector(1, 0){1.5}}
\put(5, 4.5){\oval(2, 1)}
\put(5, 4.5){\makebox(0, 0){\texttt{.tfm}}}
\put(6, 4.5){\vector(1, 0){1.5}}
\put(9.5, 4.5){\vector(1, 0){2}}
\put(12.5, 4.5){\oval(2, 1)}
\put(12.5, 4.5){\makebox(0, 0){\texttt{.log}}}
%base line
\put(.51,-1.75){\vector(-1, 0){1}}
\put(2.25, -1.75){\makebox(0, 0){Fonts}}
\put(3.9,-1.75){\vector( 1, 0){1}}
\put(6.1,-1.75){\vector(-1, 0){1}}
\put(9, -1.75){\makebox(0, 0){Typesetting}}
\put(12.4,-1.75){\vector(1, 0){1}}
\end{picture}