| Similarity | Rank | |
|---|---|---|
| solaris | 0.870 | 8564 |
| dce | 0.864 | 13660 |
| osf | 0.861 | 7357 |
| unix | 0.856 | 2232 |
| multi-processor | 0.856 | 26708 |
| posix | 0.855 | 25124 |
| encina | 0.853 | 27100 |
| ultrix | 0.853 | 25945 |
| microkernel | 0.853 | 20730 |
| unixware | 0.850 | 17558 |
| netware | 0.849 | 9094 |
| sunos | 0.848 | 31967 |
| shrinkwrap | 0.847 | 54508 |
| nt | 0.846 | 4549 |
| mvs | 0.844 | 22014 |
| mpx | 0.842 | 49934 |
| hp-ux | 0.841 | 21501 |
| oems | 0.839 | 32235 |
| 4gl | 0.839 | 25972 |
| svr4-based | 0.836 | 82341 |
| db2 | 0.835 | 20259 |
| tp | 0.835 | 22088 |
| accell | 0.834 | 42902 |
| openvms | 0.833 | 31561 |
| nfs | 0.832 | 24563 |