\catcode`@=11
\expandafter\ifx\csname graph\endcsname\relax \alloc@4\box\chardef\insc@unt\graph\fi
\catcode`@=12
\setbox\graph=\vtop{%
  \baselineskip=0pt \lineskip=0pt \lineskiplimit=0pt
  \vbox to0pt{\hbox{%
    \special{pn 8}%
    \special{pa 0 499}%
    \special{pa 0 0}%
    \special{pa 1499 0}%
    \special{pa 1499 499}%
    \special{pa 0 499}%
    \special{fp}%
    \rlap{\kern  0.749in\lower 0.291in\hbox to 0pt{\hss APPLICATION\hss}}%
    \special{pa 0 1249}%
    \special{pa 0 749}%
    \special{pa 1499 749}%
    \special{pa 1499 1249}%
    \special{pa 0 1249}%
    \special{fp}%
    \rlap{\kern  0.749in\lower 1.041in\hbox to 0pt{\hss PRESENTATION\hss}}%
    \special{pa 749 749}%
    \special{pa 749 499}%
    \special{fp}%
    \special{pa 774 599}%
    \special{pa 749 499}%
    \special{fp}%
    \special{pa 724 599}%
    \special{pa 749 499}%
    \special{fp}%
    \special{pa 0 1999}%
    \special{pa 0 1499}%
    \special{pa 1499 1499}%
    \special{pa 1499 1999}%
    \special{pa 0 1999}%
    \special{fp}%
    \rlap{\kern  0.749in\lower 1.791in\hbox to 0pt{\hss SESSION\hss}}%
    \special{pa 749 1499}%
    \special{pa 749 1249}%
    \special{fp}%
    \special{pa 774 1349}%
    \special{pa 749 1249}%
    \special{fp}%
    \special{pa 724 1349}%
    \special{pa 749 1249}%
    \special{fp}%
    \special{pa 0 2999}%
    \special{pa 0 2499}%
    \special{pa 1499 2499}%
    \special{pa 1499 2999}%
    \special{pa 0 2999}%
    \special{fp}%
    \rlap{\kern  0.749in\lower 2.791in\hbox to 0pt{\hss TRANSPORT\hss}}%
    \special{pa 749 2499}%
    \special{pa 749 1999}%
    \special{fp}%
    \special{pa 774 2099}%
    \special{pa 749 1999}%
    \special{fp}%
    \special{pa 724 2099}%
    \special{pa 749 1999}%
    \special{fp}%
    \special{pa 0 3749}%
    \special{pa 0 3249}%
    \special{pa 1499 3249}%
    \special{pa 1499 3749}%
    \special{pa 0 3749}%
    \special{fp}%
    \rlap{\kern  0.749in\lower 3.541in\hbox to 0pt{\hss NETWORK\hss}}%
    \special{pa 749 3249}%
    \special{pa 749 2999}%
    \special{fp}%
    \special{pa 774 3099}%
    \special{pa 749 2999}%
    \special{fp}%
    \special{pa 724 3099}%
    \special{pa 749 2999}%
    \special{fp}%
    \special{pa 0 4499}%
    \special{pa 0 3999}%
    \special{pa 1499 3999}%
    \special{pa 1499 4499}%
    \special{pa 0 4499}%
    \special{fp}%
    \rlap{\kern  0.749in\lower 4.291in\hbox to 0pt{\hss DATA LINK\hss}}%
    \special{pa 749 3999}%
    \special{pa 749 3749}%
    \special{fp}%
    \special{pa 774 3849}%
    \special{pa 749 3749}%
    \special{fp}%
    \special{pa 724 3849}%
    \special{pa 749 3749}%
    \special{fp}%
    \special{pa 0 5249}%
    \special{pa 0 4749}%
    \special{pa 1499 4749}%
    \special{pa 1499 5249}%
    \special{pa 0 5249}%
    \special{fp}%
    \rlap{\kern  0.749in\lower 5.041in\hbox to 0pt{\hss PHYSICAL\hss}}%
    \special{pa 749 4749}%
    \special{pa 749 4499}%
    \special{fp}%
    \special{pa 774 4599}%
    \special{pa 749 4499}%
    \special{fp}%
    \special{pa 724 4599}%
    \special{pa 749 4499}%
    \special{fp}%
    \special{pa 1999 1999}%
    \special{pa 1999 0}%
    \special{pa 3499 0}%
    \special{pa 3499 1999}%
    \special{pa 1999 1999}%
    \special{fp}%
    \rlap{\kern  2.749in\lower 1.041in\hbox to 0pt{\hss APPLICATION\hss}}%
    \special{pa 1999 2999}%
    \special{pa 1999 2499}%
    \special{pa 3499 2499}%
    \special{pa 3499 2999}%
    \special{pa 1999 2999}%
    \special{fp}%
    \rlap{\kern  2.749in\lower 2.791in\hbox to 0pt{\hss TRANSPORT\hss}}%
    \special{pa 2749 2499}%
    \special{pa 2749 1999}%
    \special{fp}%
    \special{pa 2774 2099}%
    \special{pa 2749 1999}%
    \special{fp}%
    \special{pa 2724 2099}%
    \special{pa 2749 1999}%
    \special{fp}%
    \special{pa 1999 3749}%
    \special{pa 1999 3249}%
    \special{pa 3499 3249}%
    \special{pa 3499 3749}%
    \special{pa 1999 3749}%
    \special{fp}%
    \rlap{\kern  2.749in\lower 3.541in\hbox to 0pt{\hss NETWORK\hss}}%
    \special{pa 2749 3249}%
    \special{pa 2749 2999}%
    \special{fp}%
    \special{pa 2774 3099}%
    \special{pa 2749 2999}%
    \special{fp}%
    \special{pa 2724 3099}%
    \special{pa 2749 2999}%
    \special{fp}%
    \special{pa 1999 4499}%
    \special{pa 1999 3999}%
    \special{pa 3499 3999}%
    \special{pa 3499 4499}%
    \special{pa 1999 4499}%
    \special{fp}%
    \rlap{\kern  2.749in\lower 4.291in\hbox to 0pt{\hss DATA LINK\hss}}%
    \special{pa 2749 3999}%
    \special{pa 2749 3749}%
    \special{fp}%
    \special{pa 2774 3849}%
    \special{pa 2749 3749}%
    \special{fp}%
    \special{pa 2724 3849}%
    \special{pa 2749 3749}%
    \special{fp}%
    \special{pa 1999 5249}%
    \special{pa 1999 4749}%
    \special{pa 3499 4749}%
    \special{pa 3499 5249}%
    \special{pa 1999 5249}%
    \special{fp}%
    \rlap{\kern  2.749in\lower 5.041in\hbox to 0pt{\hss PHYSICAL\hss}}%
    \special{pa 2749 4749}%
    \special{pa 2749 4499}%
    \special{fp}%
    \special{pa 2774 4599}%
    \special{pa 2749 4499}%
    \special{fp}%
    \special{pa 2724 4599}%
    \special{pa 2749 4499}%
    \special{fp}%
    \rlap{\kern  0.749in\lower 5.791in\hbox to 0pt{\hss OSI stack\hss}}%
    \rlap{\kern  2.749in\lower 5.791in\hbox to 0pt{\hss DDN stack\hss}}%
    \kern  3.500in
  }\vss}%
  \kern  5.792in
}