| Similarity | Rank | |
|---|---|---|
| svr4 | 0.846 | 10780 |
| windows | 0.845 | 2695 |
| microsoft | 0.838 | 3711 |
| unix | 0.819 | 2232 |
| ms-dos | 0.810 | 7973 |
| netware | 0.809 | 9094 |
| osf | 0.798 | 7357 |
| unixware | 0.794 | 17558 |
| dce | 0.790 | 13660 |
| solaris | 0.788 | 8564 |
| oems | 0.786 | 32235 |
| db2 | 0.785 | 20259 |
| multi-processor | 0.777 | 26708 |
| ultrix | 0.775 | 25945 |
| os | 0.774 | 6270 |
| nfs | 0.771 | 24563 |
| mvs | 0.769 | 22014 |
| sunos | 0.765 | 31967 |
| aix | 0.764 | 10805 |
| accell | 0.763 | 42902 |
| sunsoft | 0.762 | 9412 |
| sparc | 0.762 | 7164 |
| sequent | 0.760 | 14816 |
| novell | 0.758 | 6745 |
| microkernel | 0.757 | 20730 |