Daniel@0: /* courtesy Ian Darwin and Geoff Collyer, Softquad Inc. */
Daniel@0: digraph unix {
Daniel@0: size="6,6";
Daniel@0: 	"5th Edition" -> "6th Edition";
Daniel@0: 	"5th Edition" -> "PWB 1.0";
Daniel@0: 	"6th Edition" -> "LSX";
Daniel@0: 	"6th Edition" -> "1 BSD";
Daniel@0: 	"6th Edition" -> "Mini Unix";
Daniel@0: 	"6th Edition" -> "Wollongong";
Daniel@0: 	"6th Edition" -> "Interdata";
Daniel@0: 	"Interdata" -> "Unix/TS 3.0";
Daniel@0: 	"Interdata" -> "PWB 2.0";
Daniel@0: 	"Interdata" -> "7th Edition";
Daniel@0: 	"7th Edition" -> "8th Edition";
Daniel@0: 	"7th Edition" -> "32V";
Daniel@0: 	"7th Edition" -> "V7M";
Daniel@0: 	"7th Edition" -> "Ultrix-11";
Daniel@0: 	"7th Edition" -> "Xenix";
Daniel@0: 	"7th Edition" -> "UniPlus+";
Daniel@0: 	"V7M" -> "Ultrix-11";
Daniel@0: 	"8th Edition" -> "9th Edition";
Daniel@0: 	"1 BSD" -> "2 BSD";
Daniel@0: 	"2 BSD" -> "2.8 BSD";
Daniel@0: 	"2.8 BSD" -> "Ultrix-11";
Daniel@0: 	"2.8 BSD" -> "2.9 BSD";
Daniel@0: 	"32V" -> "3 BSD";
Daniel@0: 	"3 BSD" -> "4 BSD";
Daniel@0: 	"4 BSD" -> "4.1 BSD";
Daniel@0: 	"4.1 BSD" -> "4.2 BSD";
Daniel@0: 	"4.1 BSD" -> "2.8 BSD";
Daniel@0: 	"4.1 BSD" -> "8th Edition";
Daniel@0: 	"4.2 BSD" -> "4.3 BSD";
Daniel@0: 	"4.2 BSD" -> "Ultrix-32";
Daniel@0: 	"PWB 1.0" -> "PWB 1.2";
Daniel@0: 	"PWB 1.0" -> "USG 1.0";
Daniel@0: 	"PWB 1.2" -> "PWB 2.0";
Daniel@0: 	"USG 1.0" -> "CB Unix 1";
Daniel@0: 	"USG 1.0" -> "USG 2.0";
Daniel@0: 	"CB Unix 1" -> "CB Unix 2";
Daniel@0: 	"CB Unix 2" -> "CB Unix 3";
Daniel@0: 	"CB Unix 3" -> "Unix/TS++";
Daniel@0: 	"CB Unix 3" -> "PDP-11 Sys V";
Daniel@0: 	"USG 2.0" -> "USG 3.0";
Daniel@0: 	"USG 3.0" -> "Unix/TS 3.0";
Daniel@0: 	"PWB 2.0" -> "Unix/TS 3.0";
Daniel@0: 	"Unix/TS 1.0" -> "Unix/TS 3.0";
Daniel@0: 	"Unix/TS 3.0" -> "TS 4.0";
Daniel@0: 	"Unix/TS++" -> "TS 4.0";
Daniel@0: 	"CB Unix 3" -> "TS 4.0";
Daniel@0: 	"TS 4.0" -> "System V.0";
Daniel@0: 	"System V.0" -> "System V.2";
Daniel@0: 	"System V.2" -> "System V.3";
Daniel@0: }