| Similarity | Rank | |
|---|---|---|
| Unix | 0.984 | 21500 |
| MS-DOS | 0.880 | 68770 |
| Linux | 0.879 | 5281 |
| BSD | 0.867 | 45167 |
| unix | 0.855 | 63175 |
| FreeBSD | 0.852 | 43511 |
| Cygwin | 0.850 | 92882 |
| x86 | 0.841 | 39287 |
| POSIX | 0.840 | 64886 |
| MacOS | 0.840 | 63038 |
| NetBSD | 0.829 | 87686 |
| RedHat | 0.824 | 89416 |
| AIX | 0.823 | 75664 |
| COBOL | 0.823 | 76421 |
| command-line | 0.820 | 44371 |
| Perl | 0.817 | 20863 |
| DOS | 0.816 | 25920 |
| Fortran | 0.815 | 62907 |
| client-server | 0.810 | 84186 |
| Tcl | 0.808 | 95551 |
| Win32 | 0.806 | 47010 |
| executables | 0.803 | 72615 |
| OSes | 0.801 | 84328 |
| PostgreSQL | 0.801 | 48448 |
| GNU | 0.800 | 27348 |