| OS | Man Page | Section | Hits |
|---|---|---|---|
| redhat | pf | 4 | 2,495 |
| centos | pf | 4 | 2,188 |
| linux | pf | 4 | 797 |
| freebsd | pf | 4 | 618 |
| netbsd | pf | 4 | 529 |
| plan9 | pf | 4 | 452 |
| osx | pf | 4 | 392 |
| mojave | pf | 4 | 385 |
| debian | pf | 4 | 378 |
| php | pf | 4 | 341 |
| bsd | pf | 4 | 334 |
| opensolaris | pf | 4 | 329 |
| v7 | pf | 4 | 328 |
| suse | pf | 4 | 318 |
| minix | pf | 4 | 314 |
| xfree86 | pf | 4 | 310 |
| hpux | pf | 4 | 293 |
| x11r4 | pf | 4 | 275 |
| osf1 | pf | 4 | 273 |
| opendarwin | pf | 4 | 257 |