1/* Courtesy of Ian Darwin <ian@darwinsys.com>
2 * and Geoff Collyer <geoff@plan9.bell-labs.com>
3 * Mildly updated by Ian Darwin in 2000.
4 */
5digraph unix {
6	node [color=lightblue2, style=filled];
7	"5th Edition" -> "6th Edition";
8	"5th Edition" -> "PWB 1.0";
9	"6th Edition" -> "LSX";
10	"6th Edition" -> "1 BSD";
11	"6th Edition" -> "Mini Unix";
12	"6th Edition" -> "Wollongong";
13	"6th Edition" -> "Interdata";
14	"Interdata" -> "Unix/TS 3.0";
15	"Interdata" -> "PWB 2.0";
16	"Interdata" -> "7th Edition";
17	"7th Edition" -> "8th Edition";
18	"7th Edition" -> "32V";
19	"7th Edition" -> "V7M";
20	"7th Edition" -> "Ultrix-11";
21	"7th Edition" -> "Xenix";
22	"7th Edition" -> "UniPlus+";
23	"V7M" -> "Ultrix-11";
24	"8th Edition" -> "9th Edition";
25	"9th Edition" -> "10th Edition";
26	"1 BSD" -> "2 BSD";
27	"2 BSD" -> "2.8 BSD";
28	"2.8 BSD" -> "Ultrix-11";
29	"2.8 BSD" -> "2.9 BSD";
30	"32V" -> "3 BSD";
31	"3 BSD" -> "4 BSD";
32	"4 BSD" -> "4.1 BSD";
33	"4.1 BSD" -> "4.2 BSD";
34	"4.1 BSD" -> "2.8 BSD";
35	"4.1 BSD" -> "8th Edition";
36	"4.2 BSD" -> "4.3 BSD";
37	"4.2 BSD" -> "Ultrix-32";
38	"4.3 BSD" -> "4.4 BSD";
39	"4.4 BSD" -> "FreeBSD";
40	"4.4 BSD" -> "NetBSD";
41	"4.4 BSD" -> "OpenBSD";
42	"PWB 1.0" -> "PWB 1.2";
43	"PWB 1.0" -> "USG 1.0";
44	"PWB 1.2" -> "PWB 2.0";
45	"USG 1.0" -> "CB Unix 1";
46	"USG 1.0" -> "USG 2.0";
47	"CB Unix 1" -> "CB Unix 2";
48	"CB Unix 2" -> "CB Unix 3";
49	"CB Unix 3" -> "Unix/TS++";
50	"CB Unix 3" -> "PDP-11 Sys V";
51	"USG 2.0" -> "USG 3.0";
52	"USG 3.0" -> "Unix/TS 3.0";
53	"PWB 2.0" -> "Unix/TS 3.0";
54	"Unix/TS 1.0" -> "Unix/TS 3.0";
55	"Unix/TS 3.0" -> "TS 4.0";
56	"Unix/TS++" -> "TS 4.0";
57	"CB Unix 3" -> "TS 4.0";
58	"TS 4.0" -> "System V.0";
59	"System V.0" -> "System V.2";
60	"System V.2" -> "System V.3";
61	"System V.3" -> "System V.4";
62}
63