| OS | Man Page | Section | Hits |
|---|---|---|---|
| redhat | pf | 4 | 2,177 |
| centos | pf | 4 | 1,914 |
| linux | pf | 4 | 681 |
| freebsd | pf | 4 | 541 |
| netbsd | pf | 4 | 420 |
| osx | pf | 4 | 342 |
| plan9 | pf | 4 | 341 |
| debian | pf | 4 | 335 |
| mojave | pf | 4 | 317 |
| php | pf | 4 | 290 |
| opensolaris | pf | 4 | 287 |
| bsd | pf | 4 | 267 |
| v7 | pf | 4 | 267 |
| xfree86 | pf | 4 | 264 |
| minix | pf | 4 | 260 |
| x11r4 | pf | 4 | 258 |
| suse | pf | 4 | 255 |
| hpux | pf | 4 | 248 |
| osf1 | pf | 4 | 241 |
| opendarwin | pf | 4 | 216 |