1/* courtesy Ian Darwin and Geoff Collyer, Softquad Inc. */ 2digraph unix { 3size="6,6"; 4 edge [style=bold, color=red]; 5 6 "5th Edition" -> "6th Edition"; 7 "5th Edition" -> "PWB 1.0"; 8 "6th Edition" -> "LSX"; 9 "6th Edition" -> "1 BSD"; 10 "6th Edition" -> "Mini Unix"; 11 "6th Edition" -> "Wollongong"; 12 "6th Edition" -> "Interdata"; 13 "Interdata" -> "Unix/TS 3.0"; 14 "Interdata" -> "PWB 2.0"; 15 "Interdata" -> "7th Edition"; 16 "7th Edition" -> "8th Edition"; 17 "7th Edition" -> "32V"; 18 "7th Edition" -> "V7M"; 19 "7th Edition" -> "Ultrix-11"; 20 "7th Edition" -> "Xenix"; 21 "7th Edition" -> "UniPlus+"; 22 "V7M" -> "Ultrix-11"; 23 "8th Edition" -> "9th Edition"; 24 "1 BSD" -> "2 BSD"; 25 "2 BSD" -> "2.8 BSD"; 26 "2.8 BSD" -> "Ultrix-11"; 27 "2.8 BSD" -> "2.9 BSD"; 28 "32V" -> "3 BSD"; 29 "3 BSD" -> "4 BSD"; 30 "4 BSD" -> "4.1 BSD"; 31 "4.1 BSD" -> "4.2 BSD"; 32 "4.1 BSD" -> "2.8 BSD"; 33 "4.1 BSD" -> "8th Edition"; 34 "4.2 BSD" -> "4.3 BSD"; 35 "4.2 BSD" -> "Ultrix-32"; 36 "PWB 1.0" -> "PWB 1.2"; 37 "PWB 1.0" -> "USG 1.0"; 38 "PWB 1.2" -> "PWB 2.0"; 39 "USG 1.0" -> "CB Unix 1"; 40 "USG 1.0" -> "USG 2.0"; 41 "CB Unix 1" -> "CB Unix 2"; 42 "CB Unix 2" -> "CB Unix 3"; 43 "CB Unix 3" -> "Unix/TS++"; 44 "CB Unix 3" -> "PDP-11 Sys V"; 45 "USG 2.0" -> "USG 3.0"; 46 "USG 3.0" -> "Unix/TS 3.0"; 47 "PWB 2.0" -> "Unix/TS 3.0"; 48 "Unix/TS 1.0" -> "Unix/TS 3.0"; 49 "Unix/TS 3.0" -> "TS 4.0"; 50 "Unix/TS++" -> "TS 4.0"; 51 "CB Unix 3" -> "TS 4.0"; 52 "TS 4.0" -> "System V.0"; 53 "System V.0" -> "System V.2"; 54 "System V.2" -> "System V.3"; 55} 56