| OS | Man Page | Section | Hits |
|---|---|---|---|
| freebsd | fd | 4 | 753 |
| minix | fd | 4 | 707 |
| bsd | fd | 4 | 612 |
| linux | fd | 4 | 525 |
| mojave | fd | 4 | 507 |
| osx | fd | 4 | 493 |
| centos | fd | 4 | 482 |
| netbsd | fd | 4 | 467 |
| redhat | fd | 4 | 442 |
| suse | fd | 4 | 441 |
| x11r4 | fd | 1 | 420 |
| opendarwin | fd | 4 | 419 |
| hpux | fd | 1 | 413 |
| php | fd | 1 | 408 |
| v7 | fd | 1 | 408 |
| debian | fd | 1 | 405 |
| posix | fd | 1 | 402 |
| debian | fd | 4 | 396 |
| osf1 | fd | 7 | 390 |
| opensolaris | fd | 7d | 384 |
| osf1 | fd | 4 | 383 |
| plan9 | fd | 1 | 374 |
| xfree86 | fd | 1 | 367 |
| sunos | fd | 7d | 363 |
| sunos | fd | 4 | 273 |
| opensolaris | fd | 4 | 209 |