| Similarity | Rank | |
|---|---|---|
| dce | 0.863 | 13660 |
| svr4 | 0.861 | 10780 |
| unix | 0.855 | 2232 |
| solaris | 0.852 | 8564 |
| microkernel | 0.841 | 20730 |
| sco | 0.841 | 9377 |
| sunsoft | 0.826 | 9412 |
| distributed | 0.825 | 10347 |
| netware | 0.820 | 9094 |
| hewlett-packard | 0.819 | 5863 |
| ultrix | 0.818 | 25945 |
| oems | 0.813 | 32235 |
| nextstep | 0.813 | 23499 |
| encina | 0.813 | 27100 |
| openvms | 0.808 | 31561 |
| sunos | 0.808 | 31967 |
| posix | 0.807 | 25124 |
| mvs | 0.804 | 22014 |
| powerpc | 0.801 | 12778 |
| usl | 0.799 | 9106 |
| multi-processor | 0.799 | 26708 |
| nt | 0.798 | 4549 |
| hp-ux | 0.798 | 21501 |
| novell | 0.798 | 6745 |
| client-server | 0.795 | 13506 |