| OS | Man Page | Section | Hits |
|---|---|---|---|
| redhat | pf | 4 | 3,017 |
| centos | pf | 4 | 2,720 |
| linux | pf | 4 | 944 |
| freebsd | pf | 4 | 736 |
| netbsd | pf | 4 | 680 |
| plan9 | pf | 4 | 522 |
| osx | pf | 4 | 489 |
| debian | pf | 4 | 461 |
| php | pf | 4 | 449 |
| mojave | pf | 4 | 438 |
| bsd | pf | 4 | 409 |
| v7 | pf | 4 | 399 |
| opensolaris | pf | 4 | 392 |
| suse | pf | 4 | 386 |
| minix | pf | 4 | 380 |
| xfree86 | pf | 4 | 374 |
| osf1 | pf | 4 | 366 |
| hpux | pf | 4 | 358 |
| x11r4 | pf | 4 | 330 |
| opendarwin | pf | 4 | 319 |