2
2
graph [rankdir=RL, fontname=Helvetica, fontsize=36, label="\n\n\n\nObject Oriented Graphs\nStephen North, 3/19/93", size="6,6"];
3
3
node [label="\N", shape=polygon, sides=4, distortion="0.0", orientation="0.0", skew="0.0", color=white, style=filled, fontname=Helvetica];
6
"5th Edition" [sides=9, distortion="0.936354", orientation=28, skew="-0.126818", color=salmon2, pos="2082,597", width="2.14", height="0.62"];
7
"6th Edition" [sides=5, distortion="0.238792", orientation=11, skew="0.995935", color=deepskyblue, pos="1871,690", width="2.67", height="0.62"];
8
"PWB 1.0" [sides=8, distortion="0.019636", orientation=79, skew="-0.440424", color=goldenrod2, pos="1871,505", width="1.25", height="0.51"];
9
LSX [sides=9, distortion="-0.698271", orientation=22, skew="-0.195492", color=burlywood2, pos="1659,783", width="1.17", height="0.54"];
10
"1 BSD" [sides=7, distortion="0.265084", orientation=26, skew="0.403659", color=gold1, pos="1659,726", width="1.11", height="0.56"];
11
"Mini Unix" [distortion="0.039386", orientation=2, skew="-0.461120", color=greenyellow, pos="1659,580", width="1.61", height="0.67"];
12
Wollongong [sides=5, distortion="0.228564", orientation=63, skew="-0.062846", color=darkseagreen, pos="1659,842", width="1.75", height="0.61"];
13
Interdata [distortion="0.624013", orientation=56, skew="0.101396", color=dodgerblue1, pos="1659,655", width="2.06", height="0.93"];
14
"Unix/TS 3.0" [sides=8, distortion="0.731383", orientation=43, skew="-0.824612", color=thistle2, pos="1059,445", width="2.61", height="0.75"];
15
"PWB 2.0" [sides=6, distortion="0.592100", orientation=34, skew="-0.719269", color=darkolivegreen3, pos="1468,505", width="2.11", height="0.61"];
16
"7th Edition" [sides=10, distortion="0.298417", orientation=65, skew="0.310367", color=chocolate, pos="1468,707", width="1.39", height="0.64"];
17
"8th Edition" [distortion="-0.997093", orientation=50, skew="-0.061117", color=turquoise3, pos="490,593", width="2.89", height="1.06"];
18
"32V" [sides=7, distortion="0.878516", orientation=19, skew="0.592905", color=steelblue3, pos="1273,707", width="1.28", height="0.62"];
19
V7M [sides=10, distortion="-0.960249", orientation=32, skew="0.460424", color=navy, pos="1059,882", width="1.33", height="0.75"];
20
"Ultrix-11" [sides=10, distortion="-0.633186", orientation=10, skew="0.333125", color=darkseagreen4, pos="259,854", width="1.56", height="0.53"];
21
Xenix [sides=8, distortion="-0.337997", orientation=52, skew="-0.760726", color=coral, pos="1273,644", width="1.22", height="0.64"];
22
"UniPlus+" [sides=7, distortion="0.788483", orientation=39, skew="-0.526284", color=darkolivegreen3, pos="1273,773", width="2.19", height="0.72"];
23
"9th Edition" [sides=7, distortion="0.138690", orientation=55, skew="0.554049", color=coral3, pos="259,553", width="1.47", height="0.68"];
24
"2 BSD" [sides=7, distortion="-0.010661", orientation=84, skew="0.179249", color=blanchedalmond, pos="694,930", width="1.03", height="0.53"];
25
"2.8 BSD" [distortion="-0.239422", orientation=44, skew="0.053841", color=lightskyblue1, pos="490,773", width="1.67", height="0.74"];
26
"2.9 BSD" [distortion="-0.843381", orientation=70, skew="-0.601395", color=aquamarine2, pos="259,779", width="2.00", height="1.06"];
27
"3 BSD" [sides=10, distortion="0.251820", orientation=18, skew="-0.530618", color=lemonchiffon, pos="1059,704", width="1.33", height="0.50"];
28
"4 BSD" [sides=5, distortion="-0.772300", orientation=24, skew="-0.028475", color=darkorange1, pos="861,701", width="1.53", height="0.68"];
29
"4.1 BSD" [distortion="-0.226170", orientation=38, skew="0.504053", color=lightyellow1, pos="694,699", width="1.64", height="0.85"];
30
"4.2 BSD" [sides=10, distortion="-0.807349", orientation=50, skew="-0.908842", color=darkorchid4, pos="490,695", width="2.08", height="0.81"];
31
"4.3 BSD" [sides=10, distortion="-0.030619", orientation=76, skew="0.985021", color=lemonchiffon2, pos="259,695", width="1.14", height="0.78"];
32
"Ultrix-32" [distortion="-0.644209", orientation=21, skew="0.307836", color=goldenrod3, pos="259,622", width="2.08", height="0.76"];
33
"PWB 1.2" [sides=7, distortion="0.640971", orientation=84, skew="-0.768455", color=cyan, pos="1659,505", width="1.28", height="0.92"];
34
"USG 1.0" [distortion="0.758942", orientation=42, skew="0.039886", color=blue, pos="1659,421", width="2.17", height="0.92"];
35
"CB Unix 1" [sides=9, distortion="-0.348692", orientation=42, skew="0.767058", color=firebrick, pos="1468,319", width="1.58", height="0.72"];
36
"USG 2.0" [distortion="0.748625", orientation=74, skew="-0.647656", color=chartreuse4, pos="1468,425", width="1.81", height="1.03"];
37
"CB Unix 2" [sides=10, distortion="0.851818", orientation=32, skew="-0.020120", color=greenyellow, pos="1273,297", width="1.89", height="0.61"];
38
"CB Unix 3" [sides=10, distortion="0.992237", orientation=29, skew="0.256102", color=bisque4, pos="1059,312", width="2.11", height="0.68"];
39
"Unix/TS++" [sides=6, distortion="0.545461", orientation=16, skew="0.313589", color=mistyrose2, pos="861,342", width="1.86", height="0.60"];
40
"PDP-11 Sys V" [sides=9, distortion="-0.267769", orientation=40, skew="0.271226", color=cadetblue1, pos="861,283", width="1.83", height="0.56"];
41
"USG 3.0" [distortion="-0.848455", orientation=44, skew="0.267152", color=bisque2, pos="1273,445", width="2.28", height="1.06"];
42
"Unix/TS 1.0" [distortion="0.305594", orientation=75, skew="0.070516", color=orangered, pos="1273,363", width="1.92", height="0.72"];
43
"TS 4.0" [sides=10, distortion="-0.641701", orientation=50, skew="-0.952502", color=crimson, pos="694,391", width="1.75", height="0.75"];
44
"System V.0" [sides=9, distortion="0.021556", orientation=26, skew="-0.729938", color=darkorange1, pos="490,391", width="1.94", height="0.50"];
45
"System V.2" [sides=6, distortion="0.985153", orientation=33, skew="-0.399752", color=darkolivegreen4, pos="259,391", width="2.53", height="0.69"];
46
"System V.3" [sides=7, distortion="-0.687574", orientation=58, skew="-0.180116", color=lightsteelblue1, pos="66,391", width="1.83", height="0.67"];
47
"5th Edition" -> "6th Edition" [pos="e,1904,675 2050,611 2014,627 1954,654 1913,671"];
48
"5th Edition" -> "PWB 1.0" [pos="e,1904,519 2048,582 2011,566 1953,540 1914,523"];
49
"6th Edition" -> LSX [pos="e,1688,773 1846,703 1819,717 1776,739 1738,755 1725,761 1711,766 1698,770"];
50
"6th Edition" -> "1 BSD" [pos="e,1689,721 1822,698 1785,704 1734,713 1699,719"];
51
"6th Edition" -> "Mini Unix" [pos="e,1699,596 1841,671 1815,655 1774,631 1738,613 1728,609 1718,604 1708,600"];
52
"6th Edition" -> Wollongong [pos="e,1698,829 1857,706 1834,731 1786,780 1738,811 1728,816 1718,821 1708,825"];
53
"6th Edition" -> Interdata [pos="e,1703,662 1799,678 1771,674 1739,668 1713,664"];
54
Interdata -> "Unix/TS 3.0" [pos="e,1103,471 1599,641 1509,618 1333,571 1190,513 1164,502 1135,488 1112,476"];
55
Interdata -> "PWB 2.0" [pos="e,1520,524 1618,639 1604,632 1590,624 1580,613 1555,587 1569,566 1544,541 1539,536 1534,532 1529,529"];
56
Interdata -> "7th Edition" [pos="e,1507,696 1624,665 1594,673 1551,685 1517,693"];
57
"7th Edition" -> "8th Edition" [pos="e,553,593 1452,687 1432,665 1396,628 1356,612 1233,562 1191,593 1059,593 1059,593 1059,593 861,593 758,593 637,593 563,593"];
58
"7th Edition" -> "32V" [pos="e,1307,707 1419,707 1388,707 1348,707 1317,707"];
59
"7th Edition" -> V7M [pos="e,1103,885 1457,728 1439,759 1403,814 1356,841 1279,883 1176,888 1113,885"];
60
"7th Edition" -> "Ultrix-11" [pos="e,314,848 1444,725 1429,738 1409,755 1392,771 1375,786 1376,798 1356,808 1235,863 1191,827 1059,827 1059,827 1059,827 694,827 56\
61
2,827 409,839 324,847"];
62
"7th Edition" -> Xenix [pos="e,1316,658 1426,693 1397,684 1357,671 1326,661"];
63
"7th Edition" -> "UniPlus+" [pos="e,1305,762 1431,720 1397,731 1350,747 1315,759"];
64
V7M -> "Ultrix-11" [pos="e,315,856 1027,881 908,877 489,863 325,856"];
65
"8th Edition" -> "9th Edition" [pos="e,304,561 437,584 400,578 351,569 314,563"];
66
"1 BSD" -> "2 BSD" [pos="e,728,931 1630,735 1615,740 1596,747 1580,755 1436,823 1431,937 1273,937 1273,937 1273,937 1059,937 943,937 807,933 738,931"];
67
"2 BSD" -> "2.8 BSD" [pos="e,510,788 676,916 639,888 560,827 518,794"];
68
"2.8 BSD" -> "Ultrix-11" [pos="e,297,843 461,784 426,797 371,819 350,826 336,831 320,836 307,840"];
69
"2.8 BSD" -> "2.9 BSD" [pos="e,300,778 440,774 402,775 349,777 310,778"];
70
"32V" -> "3 BSD" [pos="e,1101,704 1228,706 1194,705 1147,705 1111,704"];
71
"3 BSD" -> "4 BSD" [pos="e,909,702 1013,703 985,702 949,702 919,702"];
72
"4 BSD" -> "4.1 BSD" [pos="e,750,700 820,701 802,701 780,700 760,700"];
73
"4.1 BSD" -> "4.2 BSD" [pos="e,544,696 648,698 620,697 584,697 554,696"];
74
"4.1 BSD" -> "2.8 BSD" [pos="e,520,762 663,710 628,723 569,744 530,759"];
75
"4.1 BSD" -> "8th Edition" [pos="e,527,612 659,681 625,663 573,636 536,617"];
76
"4.2 BSD" -> "4.3 BSD" [pos="e,299,695 439,695 401,695 348,695 309,695"];
77
"4.2 BSD" -> "Ultrix-32" [pos="e,301,635 431,676 394,664 346,650 311,638"];
78
"PWB 1.0" -> "PWB 1.2" [pos="e,1700,505 1829,505 1794,505 1747,505 1710,505"];
79
"PWB 1.0" -> "USG 1.0" [pos="e,1696,436 1836,491 1801,477 1745,456 1706,440"];
80
"PWB 1.2" -> "PWB 2.0" [pos="e,1529,505 1616,505 1593,505 1565,505 1539,505"];
81
"USG 1.0" -> "CB Unix 1" [pos="e,1508,340 1630,405 1600,389 1553,365 1517,345"];
82
"USG 1.0" -> "USG 2.0" [pos="e,1508,424 1603,422 1577,423 1545,423 1518,424"];
83
"CB Unix 1" -> "CB Unix 2" [pos="e,1321,302 1420,314 1393,310 1360,307 1331,303"];
84
"CB Unix 2" -> "CB Unix 3" [pos="e,1104,309 1218,301 1186,303 1147,305 1114,308"];
85
"CB Unix 3" -> "Unix/TS++" [pos="e,904,335 1009,320 980,324 944,330 914,334"];
86
"CB Unix 3" -> "PDP-11 Sys V" [pos="e,919,292 990,302 970,299 949,296 929,293"];
87
"USG 2.0" -> "USG 3.0" [pos="e,1318,440 1429,429 1401,432 1361,436 1328,439"];
88
"USG 3.0" -> "Unix/TS 3.0" [pos="e,1128,445 1225,445 1200,445 1168,445 1138,445"];
89
"PWB 2.0" -> "Unix/TS 3.0" [pos="e,1118,470 1403,507 1346,508 1262,506 1190,492 1169,488 1147,480 1128,473"];
90
"Unix/TS 1.0" -> "Unix/TS 3.0" [pos="e,1092,432 1231,379 1193,394 1139,414 1102,428"];
91
"Unix/TS 3.0" -> "TS 4.0" [pos="e,750,399 969,432 904,423 818,410 760,401"];
92
"Unix/TS++" -> "TS 4.0" [pos="e,724,382 818,355 792,362 759,371 734,379"];
93
"CB Unix 3" -> "TS 4.0" [pos="e,741,392 1035,326 1009,341 967,362 928,372 868,387 798,391 751,392"];
94
"TS 4.0" -> "System V.0" [pos="e,558,391 649,391 625,391 596,391 568,391"];
95
"System V.0" -> "System V.2" [pos="e,324,391 423,391 395,391 362,391 334,391"];
96
"System V.2" -> "System V.3" [pos="e,123,391 170,391 158,391 145,391 133,391"];
6
"5th Edition" [sides=9, distortion="0.936354", orientation=28, skew="-0.126818", color=salmon2, pos="2114,572", width="2.42", height="0.62"];
7
"6th Edition" [sides=5, distortion="0.238792", orientation=11, skew="0.995935", color=deepskyblue, pos="1895,652", width="2.61", height="0.54"];
8
"PWB 1.0" [sides=8, distortion="0.019636", orientation=79, skew="-0.440424", color=goldenrod2, pos="1895,493", width="1.36", height="0.50"];
9
LSX [sides=9, distortion="-0.698271", orientation=22, skew="-0.195492", color=burlywood2, pos="1698,739", width="1.19", height="0.54"];
10
"1 BSD" [sides=7, distortion="0.265084", orientation=26, skew="0.403659", color=gold1, pos="1698,683", width="1.17", height="0.54"];
11
"Mini Unix" [distortion="0.039386", orientation=2, skew="-0.461120", color=greenyellow, pos="1698,560", width="1.33", height="0.50"];
12
Wollongong [sides=5, distortion="0.228564", orientation=63, skew="-0.062846", color=darkseagreen, pos="1698,795", width="1.69", height="0.53"];
13
Interdata [distortion="0.624013", orientation=56, skew="0.101396", color=dodgerblue1, pos="1698,621", width="1.72", height="0.71"];
14
"Unix/TS 3.0" [sides=8, distortion="0.731383", orientation=43, skew="-0.824612", color=thistle2, pos="1092,441", width="2.92", height="0.74"];
15
"PWB 2.0" [sides=6, distortion="0.592100", orientation=34, skew="-0.719269", color=darkolivegreen3, pos="1518,493", width="2.14", height="0.56"];
16
"7th Edition" [sides=10, distortion="0.298417", orientation=65, skew="0.310367", color=chocolate, pos="1518,693", width="1.58", height="0.64"];
17
"8th Edition" [distortion="-0.997093", orientation=50, skew="-0.061117", color=turquoise3, pos="495,579", width="2.44", height="0.81"];
18
"32V" [sides=7, distortion="0.878516", orientation=19, skew="0.592905", color=steelblue3, pos="1319,693", width="1.25", height="0.61"];
19
V7M [sides=10, distortion="-0.960249", orientation=32, skew="0.460424", color=navy, pos="1092,866", width="1.39", height="0.75"];
20
"Ultrix-11" [sides=10, distortion="-0.633186", orientation=10, skew="0.333125", color=darkseagreen4, pos="275,830", width="1.72", height="0.53"];
21
Xenix [sides=8, distortion="-0.337997", orientation=52, skew="-0.760726", color=coral, pos="1319,630", width="1.28", height="0.64"];
22
"UniPlus+" [sides=7, distortion="0.788483", orientation=39, skew="-0.526284", color=darkolivegreen3, pos="1319,758", width="2.36", height="0.69"];
23
"9th Edition" [sides=7, distortion="0.138690", orientation=55, skew="0.554049", color=coral3, pos="275,559", width="1.58", height="0.67"];
24
"2 BSD" [sides=7, distortion="-0.010661", orientation=84, skew="0.179249", color=blanchedalmond, pos="690,914", width="1.06", height="0.51"];
25
"2.8 BSD" [distortion="-0.239422", orientation=44, skew="0.053841", color=lightskyblue1, pos="495,763", width="1.39", height="0.56"];
26
"2.9 BSD" [distortion="-0.843381", orientation=70, skew="-0.601395", color=aquamarine2, pos="275,764", width="1.67", height="0.81"];
27
"3 BSD" [sides=10, distortion="0.251820", orientation=18, skew="-0.530618", color=lemonchiffon, pos="1092,693", width="1.47", height="0.50"];
28
"4 BSD" [sides=5, distortion="-0.772300", orientation=24, skew="-0.028475", color=darkorange1, pos="873,692", width="1.39", height="0.58"];
29
"4.1 BSD" [distortion="-0.226170", orientation=38, skew="0.504053", color=lightyellow1, pos="690,691", width="1.36", height="0.64"];
30
"4.2 BSD" [sides=10, distortion="-0.807349", orientation=50, skew="-0.908842", color=darkorchid4, pos="495,689", width="2.36", height="0.81"];
31
"4.3 BSD" [sides=10, distortion="-0.030619", orientation=76, skew="0.985021", color=lemonchiffon2, pos="275,689", width="1.28", height="0.78"];
32
"Ultrix-32" [distortion="-0.644209", orientation=21, skew="0.307836", color=goldenrod3, pos="275,622", width="1.75", height="0.58"];
33
"PWB 1.2" [sides=7, distortion="0.640971", orientation=84, skew="-0.768455", color=cyan, pos="1698,493", width="1.39", height="0.88"];
34
"USG 1.0" [distortion="0.758942", orientation=42, skew="0.039886", color=blue, pos="1698,419", width="1.81", height="0.69"];
35
"CB Unix 1" [sides=9, distortion="-0.348692", orientation=42, skew="0.767058", color=firebrick, pos="1518,332", width="1.81", height="0.72"];
36
"USG 2.0" [distortion="0.748625", orientation=74, skew="-0.647656", color=chartreuse4, pos="1518,423", width="1.50", height="0.78"];
37
"CB Unix 2" [sides=10, distortion="0.851818", orientation=32, skew="-0.020120", color=greenyellow, pos="1319,316", width="2.14", height="0.61"];
38
"CB Unix 3" [sides=10, distortion="0.992237", orientation=29, skew="0.256102", color=bisque4, pos="1092,335", width="2.39", height="0.68"];
39
"Unix/TS++" [sides=6, distortion="0.545461", orientation=16, skew="0.313589", color=mistyrose2, pos="873,340", width="1.92", height="0.56"];
40
"PDP-11 Sys V" [sides=9, distortion="-0.267769", orientation=40, skew="0.271226", color=cadetblue1, pos="873,282", width="2.14", height="0.56"];
41
"USG 3.0" [distortion="-0.848455", orientation=44, skew="0.267152", color=bisque2, pos="1319,441", width="1.92", height="0.81"];
42
"Unix/TS 1.0" [distortion="0.305594", orientation=75, skew="0.070516", color=orangered, pos="1319,375", width="1.64", height="0.54"];
43
"TS 4.0" [sides=10, distortion="-0.641701", orientation=50, skew="-0.952502", color=crimson, pos="690,388", width="1.92", height="0.75"];
44
"System V.0" [sides=9, distortion="0.021556", orientation=26, skew="-0.729938", color=darkorange1, pos="495,388", width="2.19", height="0.50"];
45
"System V.2" [sides=6, distortion="0.985153", orientation=33, skew="-0.399752", color=darkolivegreen4, pos="275,388", width="2.64", height="0.64"];
46
"System V.3" [sides=7, distortion="-0.687574", orientation=58, skew="-0.180116", color=lightsteelblue1, pos="72,388", width="1.97", height="0.65"];
47
"5th Edition" -> "6th Edition" [pos="e,1929,640 2077,585 2039,599 1979,621 1939,636"];
48
"5th Edition" -> "PWB 1.0" [pos="e,1933,507 2073,557 2036,543 1981,524 1943,510"];
49
"6th Edition" -> LSX [pos="e,1724,728 1870,663 1843,675 1801,695 1764,711 1754,715 1743,719 1733,724"];
50
"6th Edition" -> "1 BSD" [pos="e,1730,678 1848,659 1816,664 1772,671 1740,676"];
51
"6th Edition" -> "Mini Unix" [pos="e,1731,573 1864,636 1838,622 1799,602 1764,587 1756,583 1748,580 1741,577"];
52
"6th Edition" -> Wollongong [pos="e,1733,782 1882,666 1860,689 1812,736 1764,767 1757,771 1750,775 1743,778"];
53
"6th Edition" -> Interdata [pos="e,1734,627 1825,641 1798,637 1768,632 1744,629"];
54
Interdata -> "Unix/TS 3.0" [pos="e,1151,467 1649,610 1563,591 1382,548 1234,499 1209,491 1183,481 1160,471"];
55
Interdata -> "PWB 2.0" [pos="e,1570,511 1666,609 1654,603 1642,596 1632,587 1609,565 1619,547 1596,527 1591,522 1585,519 1579,516"];
56
Interdata -> "7th Edition" [pos="e,1555,678 1674,631 1647,642 1600,660 1565,674"];
57
"7th Edition" -> "8th Edition" [pos="e,549,579 1502,673 1481,651 1445,614 1404,598 1274,546 1230,579 1092,579 1092,579 1092,579 873,579 762,579 634,579 559,579"];
58
"7th Edition" -> "32V" [pos="e,1353,693 1461,693 1430,693 1392,693 1363,693"];
59
"7th Edition" -> V7M [pos="e,1139,870 1506,715 1488,745 1452,799 1404,825 1323,868 1215,873 1149,870"];
60
"7th Edition" -> "Ultrix-11" [pos="e,336,825 1477,707 1464,712 1451,720 1440,730 1416,751 1431,775 1404,792 1344,828 1161,811 1092,811 1092,811 1092,811 690,811 56\
61
9,811 429,819 346,824"];
62
"7th Edition" -> Xenix [pos="e,1364,644 1473,679 1443,669 1404,658 1374,647"];
63
"7th Edition" -> "UniPlus+" [pos="e,1352,747 1477,706 1443,718 1396,733 1362,744"];
64
V7M -> "Ultrix-11" [pos="e,337,833 1058,864 936,859 517,841 347,833"];
65
"8th Edition" -> "9th Edition" [pos="e,324,564 448,575 414,572 370,568 334,565"];
66
"1 BSD" -> "2 BSD" [pos="e,725,915 1671,693 1659,698 1644,704 1632,711 1484,790 1486,921 1319,921 1319,921 1319,921 1092,921 962,921 810,917 735,915"];
67
"2 BSD" -> "2.8 BSD" [pos="e,511,775 672,900 637,873 558,812 519,781"];
68
"2.8 BSD" -> "Ultrix-11" [pos="e,315,818 469,771 444,779 404,792 370,802 355,806 339,811 325,815"];
69
"2.8 BSD" -> "2.9 BSD" [pos="e,310,764 455,763 416,763 359,763 320,764"];
70
"32V" -> "3 BSD" [pos="e,1139,693 1274,693 1238,693 1188,693 1149,693"];
71
"3 BSD" -> "4 BSD" [pos="e,918,692 1041,693 1007,692 962,692 928,692"];
72
"4 BSD" -> "4.1 BSD" [pos="e,738,691 835,692 810,691 776,691 748,691"];
73
"4.1 BSD" -> "4.2 BSD" [pos="e,554,690 651,691 626,691 593,690 564,690"];
74
"4.1 BSD" -> "2.8 BSD" [pos="e,519,754 666,700 631,713 568,736 529,750"];
75
"4.1 BSD" -> "8th Edition" [pos="e,520,594 662,675 627,655 567,621 529,599"];
76
"4.2 BSD" -> "4.3 BSD" [pos="e,320,689 437,689 404,689 362,689 330,689"];
77
"4.2 BSD" -> "Ultrix-32" [pos="e,309,632 430,669 394,658 350,645 319,635"];
78
"PWB 1.0" -> "PWB 1.2" [pos="e,1742,493 1849,493 1820,493 1783,493 1752,493"];
79
"PWB 1.0" -> "USG 1.0" [pos="e,1729,431 1857,479 1823,466 1773,447 1739,434"];
80
"PWB 1.2" -> "PWB 2.0" [pos="e,1580,493 1652,493 1633,493 1611,493 1590,493"];
81
"USG 1.0" -> "CB Unix 1" [pos="e,1562,353 1673,407 1647,394 1605,374 1571,358"];
82
"USG 1.0" -> "USG 2.0" [pos="e,1552,422 1652,420 1624,421 1589,422 1562,422"];
83
"CB Unix 1" -> "CB Unix 2" [pos="e,1373,320 1465,328 1440,326 1410,324 1383,321"];
84
"CB Unix 2" -> "CB Unix 3" [pos="e,1142,331 1259,321 1226,324 1186,327 1152,330"];
85
"CB Unix 3" -> "Unix/TS++" [pos="e,928,339 1020,337 994,337 964,338 938,339"];
86
"CB Unix 3" -> "PDP-11 Sys V" [pos="e,929,295 1030,320 1002,313 968,305 939,298"];
87
"USG 2.0" -> "USG 3.0" [pos="e,1357,438 1486,426 1454,429 1404,433 1367,437"];
88
"USG 3.0" -> "Unix/TS 3.0" [pos="e,1170,441 1279,441 1252,441 1214,441 1180,441"];
89
"PWB 2.0" -> "Unix/TS 3.0" [pos="e,1163,463 1445,493 1387,493 1305,490 1234,479 1214,476 1193,471 1173,466"];
90
"Unix/TS 1.0" -> "Unix/TS 3.0" [pos="e,1132,430 1282,386 1243,397 1184,414 1142,427"];
91
"Unix/TS 3.0" -> "TS 4.0" [pos="e,750,396 991,428 933,420 861,410 796,402 784,400 772,399 760,397"];
92
"Unix/TS++" -> "TS 4.0" [pos="e,723,379 827,352 799,359 761,369 733,377"];
93
"CB Unix 3" -> "TS 4.0" [pos="e,737,387 1052,347 1024,355 985,364 950,369 881,379 800,384 747,387"];
94
"TS 4.0" -> "System V.0" [pos="e,572,388 641,388 623,388 602,388 582,388"];
95
"System V.0" -> "System V.2" [pos="e,342,388 419,388 397,388 374,388 352,388"];
96
"System V.2" -> "System V.3" [pos="e,134,388 182,388 170,388 156,388 144,388"];