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% Boxes at the top:
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\put(1988,-136){\framebox(825,525){}}
\put(2981,-136){\framebox(825,525){}}
\put(3975,-136){\framebox(825,525){}}
% The three big long boxes:
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\put(  1,-1561){\framebox(4800,450){}}
\put(  1,-2236){\framebox(4800,450){}}
% lines from boxes at top to Shells & Utilities and X
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\put(2439,-136){\line( 0,-1){300}}
\put(3414,-136){\line( 0,-1){300}}
\put(4389,-136){\line( 0,-1){300}}
% Lines from Shells & Utilities and X to Kernel:
\put(901,-886){\line( 0,-1){225}}
\put(3899,-886){\line( 0,-1){225}}
% Lines from Kernel to Hardware
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% Text in small boxes at top:
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\put(1406, 89){\makebox(0,0)[cb]{\smash{\SetFigFont{10}{12.0}{\sfdefault}{\mddefault}{\updefault}DBMS}}}
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\put(2400, 14){\makebox(0,0)[cb]{\smash{\SetFigFont{10}{12.0}{\sfdefault}{\mddefault}{\updefault}Editors}}}
\put(3394, 89){\makebox(0,0)[cb]{\smash{\SetFigFont{10}{12.0}{\sfdefault}{\mddefault}{\updefault}Mailers}}}
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% Text in long boxes:
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