| OS | Man Page | Section | Hits |
|---|---|---|---|
| freebsd | fd | 4 | 851 |
| minix | fd | 4 | 758 |
| bsd | fd | 4 | 748 |
| linux | fd | 4 | 577 |
| osx | fd | 4 | 568 |
| mojave | fd | 4 | 558 |
| netbsd | fd | 4 | 542 |
| centos | fd | 4 | 526 |
| redhat | fd | 4 | 499 |
| suse | fd | 4 | 482 |
| x11r4 | fd | 1 | 469 |
| posix | fd | 1 | 461 |
| opendarwin | fd | 4 | 461 |
| hpux | fd | 1 | 452 |
| v7 | fd | 1 | 451 |
| debian | fd | 4 | 442 |
| php | fd | 1 | 440 |
| debian | fd | 1 | 440 |
| osf1 | fd | 7 | 431 |
| plan9 | fd | 1 | 427 |
| osf1 | fd | 4 | 425 |
| opensolaris | fd | 7d | 416 |
| xfree86 | fd | 1 | 413 |
| sunos | fd | 7d | 408 |
| sunos | fd | 4 | 296 |
| opensolaris | fd | 4 | 258 |