| Similarity | Rank | |
|---|---|---|
| FreeBSD | 0.904 | 43511 |
| BSD | 0.845 | 45167 |
| Linux | 0.838 | 5281 |
| GNU | 0.837 | 27348 |
| Slackware | 0.835 | 81979 |
| Debian | 0.832 | 25589 |
| UNIX | 0.829 | 26761 |
| POSIX | 0.825 | 64886 |
| Unix | 0.823 | 21500 |
| MacOS | 0.822 | 63038 |
| Cygwin | 0.821 | 92882 |
| AIX | 0.806 | 75664 |
| MS-DOS | 0.804 | 68770 |
| CentOS | 0.801 | 66620 |
| SUSE | 0.800 | 84216 |
| Fedora | 0.799 | 33321 |
| RedHat | 0.799 | 89416 |
| debian | 0.788 | 80872 |
| VirtualBox | 0.786 | 72778 |
| x86 | 0.786 | 39287 |
| X11 | 0.783 | 67694 |
| x64 | 0.783 | 65430 |
| 12.04 | 0.778 | 99393 |
| linux | 0.777 | 24945 |
| 64bit | 0.774 | 66119 |