digraph asde91 {
ranksep=.75;
size = "7.5,7.5";
	{
		node [shape=plaintext, fontsize=16];

		/* the time-line graph */
		past -> 1978 -> 1980 -> 1982 -> 1983 -> 1985 -> 1986 ->
				1987 -> 1988 -> 1989 -> 1990 -> "future";

		/* ancestor programs */

		"Bourne sh"; "make"; "SCCS"; "yacc"; "cron"; "Reiser cpp";
		"Cshell"; "emacs"; "build"; "vi"; "<curses>"; "RCS"; "C*";
	}

	{ rank = same;
		"Software IS"; "Configuration Mgt"; "Architecture & Libraries";
		"Process";
	};

	node [shape=box];

	{ rank = same; "past"; "SCCS"; "make"; "Bourne sh"; "yacc"; "cron"; }
	{ rank = same; 1978; "Reiser cpp"; "Cshell"; }
	{ rank = same; 1980; "build"; "emacs"; "vi"; }
	{ rank = same; 1982; "RCS"; "<curses>"; "IMX"; "SYNED"; }
	{ rank = same; 1983; "ksh"; "IFS"; "TTU"; }
	{ rank = same; 1985; "nmake"; "Peggy"; }
	{ rank = same; 1986; "C*"; "ncpp"; "ksh-i"; "<curses-i>"; "PG2"; }
	{ rank = same; 1987; "Ansi cpp"; "nmake 2.0"; "3D File System"; "fdelta";
		"DAG"; "CSAS";}
	{ rank = same; 1988; "CIA"; "SBCS"; "ksh-88"; "PEGASUS/PML"; "PAX";
		"backtalk"; }
	{ rank = same; 1989; "CIA++"; "APP"; "SHIP"; "DataShare"; "ryacc";
		"Mosaic"; }
	{ rank = same; 1990; "libft"; "CoShell"; "DIA"; "IFS-i"; "kyacc"; "sfio";
		"yeast"; "ML-X"; "DOT";  }
	{ rank = same; "future"; "Adv. Software Technology"; }

	"PEGASUS/PML" -> "ML-X";
	"SCCS" -> "nmake";
	"SCCS" -> "3D File System";
	"SCCS" -> "RCS";
	"make" -> "nmake";
	"make" -> "build";
	"Bourne sh" -> "Cshell";
	"Bourne sh" -> "ksh";
	"Reiser cpp" -> "ncpp";
	"Cshell" -> "ksh";
	"build" -> "nmake 2.0";
	"emacs" -> "ksh";
	"vi" -> "ksh";
	"vi" -> "<curses>";
	"IFS" -> "<curses-i>";
	"IFS" -> "IFS-i";
	"IFS" -> "sfio";
	"<curses>" -> "<curses-i>";
	"<curses-i>" -> "fdelta";
	"RCS" -> "SBCS";
	"RCS" -> "fdelta";
	"ksh" -> "nmake";
	"ksh" -> "ksh-i";
	"ksh" -> "ksh-88";
	"ksh-i" -> "ksh-88";
	"nmake" -> "ksh";
	"nmake" -> "ncpp";
	"nmake" -> "3D File System";
	"nmake" -> "nmake 2.0";
	"ncpp" -> "Ansi cpp";
	"C*" -> "CSAS";
	"fdelta" -> "SBCS";
	"CSAS" -> "CIA";
	"ksh-88" -> "sfio";
	"ksh-88" -> "Configuration Mgt";
	"ksh-88" -> "Architecture & Libraries";
	"IFS-i" -> "Architecture & Libraries";
	"SYNED" -> "Peggy";
	"Peggy" -> "PEGASUS/PML";
	"Peggy" -> "ryacc";
	"PEGASUS/PML" -> "Architecture & Libraries";
	"yacc" -> "ryacc";
	"ryacc" -> "kyacc";
	"kyacc" -> "Architecture & Libraries";
	"ML-X" -> "Architecture & Libraries";
	"APP" -> "Software IS";
	"SBCS" -> "Configuration Mgt";
	"DAG" -> "Software IS";
	"DAG" -> "DOT";
	"CIA++" -> "Software IS";
	"Ansi cpp" -> "Configuration Mgt";
	"nmake 2.0" -> "Configuration Mgt";
	"3D File System" -> "Configuration Mgt";
	"CIA" -> "CIA++";
	"IMX" -> "TTU";
	"TTU" -> "PG2";
	"PG2" -> "backtalk";
	"backtalk" -> "DataShare";
	"DataShare" -> "Architecture & Libraries";
	"nmake 2.0" -> "CoShell";
	"CIA" -> "DIA";
	"APP" -> "DIA";
	"DAG" -> "DIA";
	"fdelta" -> "PAX";
	"PAX" -> "SHIP";
	"SHIP" -> "Configuration Mgt";
	"DIA" -> "Software IS";
	"DOT" -> "Software IS";
	"libft" -> "Software IS";
	"sfio" -> "Architecture & Libraries";
	"CoShell" -> "Configuration Mgt";
	"CoShell" -> "Architecture & Libraries";
	"Mosaic" -> "Process";
	"cron" -> "yeast";
	"yeast" -> "Process";
	"Software IS" -> "Adv. Software Technology";
	"Configuration Mgt" -> "Adv. Software Technology";
	"Architecture & Libraries" -> "Adv. Software Technology";
	"Process" -> "Adv. Software Technology";
}