| OS | Man Page | Section | Hits |
|---|---|---|---|
| redhat | pf | 4 | 189 |
| centos | pf | 4 | 175 |
| freebsd | pf | 4 | 155 |
| linux | pf | 4 | 130 |
| netbsd | pf | 4 | 98 |
| debian | pf | 4 | 90 |
| opensolaris | pf | 4 | 67 |
| plan9 | pf | 4 | 66 |
| xfree86 | pf | 4 | 61 |
| mojave | pf | 4 | 61 |
| osx | pf | 4 | 58 |
| minix | pf | 4 | 57 |
| php | pf | 4 | 48 |
| bsd | pf | 4 | 48 |
| x11r4 | pf | 4 | 46 |
| suse | pf | 4 | 45 |
| v7 | pf | 4 | 41 |
| osf1 | pf | 4 | 37 |
| hpux | pf | 4 | 34 |
| opendarwin | pf | 4 | 29 |