| Similarity | Rank | |
|---|---|---|
| svr4-based | 0.929 | 82341 |
| xenix | 0.928 | 53595 |
| lu6 | 0.923 | 66217 |
| posix-compliant | 0.921 | 64621 |
| gcos | 0.920 | 56928 |
| 3000 | 0.918 | 72338 |
| ftx | 0.917 | 88971 |
| ctos | 0.916 | 75879 |
| ca-unicenter | 0.914 | 41866 |
| sinix | 0.913 | 63188 |
| mpx | 0.913 | 49934 |
| 700s | 0.912 | 59326 |
| bs2000 | 0.912 | 74997 |
| 1-based | 0.911 | 84527 |
| x-window | 0.910 | 33944 |
| 0-on-intel | 0.910 | 80906 |
| enhancements | 0.909 | 89398 |
| sqlbase | 0.909 | 84840 |
| ultrix | 0.907 | 25945 |
| c400 | 0.907 | 94923 |
| codecenter | 0.906 | 74846 |
| desqview | 0.906 | 83499 |
| lsx | 0.906 | 66805 |
| hp9000 | 0.906 | 85960 |
| pc-xview | 0.905 | 92376 |