edge "PWB 1.0" "USG 1.0" 4 11.583 14.597 11.903 14.389 12.458 14.028 12.819 13.778 solid black
edge "1 BSD" "2 BSD" 10 4.208 13.347 3.486 12.806 1.681 11.444 1.681 10.931 1.681 10.931 1.681 10.931 1.681 9.653 1.681 9.097 1.556 8.153 1.486 7.653 solid black
edge Interdata "Unix/TS 3.0" 7 6.139 13.333 6.625 12.069 8.917 12.208 10.069 11.333 10.417 11.069 10.778 10.458 11.000 10.042 solid black
edge Interdata "PWB 2.0" 10 6.361 13.389 6.569 13.278 6.833 13.153 7.014 13.111 8.042 12.861 9.111 12.819 10.139 12.611 10.292 12.583 10.514 12.500 10.708 12.431 solid black
edge Interdata "7th Edition" 4 5.875 13.361 5.653 13.153 5.292 12.833 5.028 12.569 solid black
edge "Unix/TS 3.0" "TS 4.0" 4 11.292 9.431 11.444 9.000 11.778 8.125 11.944 7.653 solid black
edge "PWB 2.0" "Unix/TS 3.0" 4 11.208 12.000 11.208 11.556 11.208 10.583 11.208 10.042 solid black
edge "7th Edition" "8th Edition" 13 5.194 12.139 5.903 12.028 7.125 11.778 7.681 11.333 8.125 10.972 7.903 10.208 7.903 9.653 7.903 9.653 7.903 9.653 7.903 8.486 7.903 7.889 7.903 6.875 7.903 6.347 solid black
edge "7th Edition" "32V" 4 4.639 11.944 4.639 11.764 4.639 11.528 4.639 11.319 solid black
edge "7th Edition" V7M 7 4.069 12.083 3.458 11.917 2.528 11.639 2.028 11.333 1.625 11.069 1.153 10.444 0.875 10.028 solid black
edge "7th Edition" "Ultrix-11" 13 4.139 12.042 3.542 11.861 2.889 11.778 2.486 11.333 2.111 10.917 2.264 10.208 2.264 9.653 2.264 9.653 2.264 9.653 2.264 7.319 2.264 6.667 1.847 5.639 1.611 5.097 solid black
edge "7th Edition" Xenix 4 4.347 11.958 4.125 11.764 3.833 11.500 3.611 11.292 solid black
edge "7th Edition" "UniPlus+" 4 4.958 12.000 5.278 11.778 5.778 11.444 6.111 11.194 solid black
edge "8th Edition" "9th Edition" 4 8.000 5.792 8.069 5.611 8.167 5.347 8.250 5.139 solid black
edge "32V" "3 BSD" 4 4.653 10.694 4.667 10.514 4.681 10.236 4.681 10.028 solid black
edge V7M "Ultrix-11" 7 0.639 9.375 0.653 8.819 0.708 7.625 0.819 6.944 0.917 6.417 1.181 5.542 1.333 5.069 solid black
edge "2 BSD" "2.8 BSD" 4 1.722 7.139 2.069 6.917 2.653 6.528 3.028 6.292 solid black
edge "2.8 BSD" "Ultrix-11" 4 3.125 5.861 2.792 5.639 2.236 5.264 1.861 5.014 solid black
edge "2.8 BSD" "2.9 BSD" 4 3.375 5.792 3.361 5.611 3.347 5.333 3.319 5.125 solid black
edge "3 BSD" "4 BSD" 4 4.736 9.417 4.764 9.250 4.819 9.014 4.847 8.819 solid black
edge "4 BSD" "4.1 BSD" 4 4.917 8.264 4.931 8.097 4.944 7.861 4.944 7.667 solid black
edge "4.1 BSD" "8th Edition" 4 5.292 7.181 5.792 6.944 6.833 6.514 7.431 6.250 solid black
edge "4.1 BSD" "2.8 BSD" 4 4.611 7.028 4.333 6.806 3.958 6.486 3.681 6.278 solid black
edge "4.1 BSD" "4.2 BSD" 4 5.042 7.111 5.097 6.931 5.194 6.625 5.264 6.403 solid black
edge "4.2 BSD" "4.3 BSD" 4 5.653 5.833 5.917 5.639 6.306 5.319 6.611 5.097 solid black
edge "4.2 BSD" "Ultrix-32" 4 5.389 5.736 5.389 5.528 5.389 5.250 5.389 5.056 solid black
edge "PWB 1.2" "PWB 2.0" 4 11.278 13.167 11.264 12.986 11.250 12.792 11.236 12.611 solid black
edge "USG 1.0" "CB Unix 1" 4 13.403 13.389 13.708 13.167 14.236 12.764 14.611 12.500 solid black
edge "USG 1.0" "USG 2.0" 4 13.181 13.347 13.181 13.167 13.181 12.917 13.181 12.694 solid black
edge "CB Unix 1" "CB Unix 2" 4 14.972 11.903 14.958 11.736 14.958 11.528 14.958 11.347 solid black
edge "USG 2.0" "USG 3.0" 4 13.083 11.944 13.000 11.764 12.917 11.514 12.833 11.306 solid black
edge "CB Unix 2" "CB Unix 3" 4 14.889 10.708 14.847 10.528 14.778 10.292 14.722 10.069 solid black
edge "CB Unix 3" "Unix/TS++" 4 14.319 9.389 14.139 9.236 13.903 9.014 13.708 8.833 solid black
edge "CB Unix 3" "PDP-11 Sys V" 4 14.750 9.403 14.847 9.250 14.958 9.028 15.056 8.847 solid black
edge "CB Unix 3" "TS 4.0" 7 13.792 9.458 13.264 9.306 12.625 9.069 12.292 8.778 12.069 8.569 12.028 8.056 12.042 7.694 solid black
edge "Unix/TS++" "TS 4.0" 4 13.056 8.236 12.903 8.097 12.708 7.917 12.528 7.750 solid black
edge "USG 3.0" "Unix/TS 3.0" 4 12.250 10.542 12.069 10.389 11.875 10.222 11.694 10.069 solid black
edge "Unix/TS 1.0" "Unix/TS 3.0" 4 9.417 10.736 9.792 10.514 10.389 10.153 10.792 9.903 solid black
edge "TS 4.0" "System V.0" 4 12.069 7.028 12.069 6.833 12.069 6.611 12.069 6.417 solid black
edge "System V.0" "System V.2" 4 12.069 5.806 12.069 5.625 12.069 5.347 12.069 5.125 solid black
edge "System V.2" "System V.3" 4 12.069 4.514 12.069 4.333 12.069 4.083 12.069 3.875 solid black
stop