| OS | Man Page | Section | Hits |
|---|---|---|---|
| redhat | pf | 4 | 828 |
| centos | pf | 4 | 721 |
| linux | pf | 4 | 358 |
| freebsd | pf | 4 | 303 |
| netbsd | pf | 4 | 193 |
| debian | pf | 4 | 176 |
| osx | pf | 4 | 163 |
| mojave | pf | 4 | 162 |
| plan9 | pf | 4 | 159 |
| opensolaris | pf | 4 | 137 |
| xfree86 | pf | 4 | 131 |
| minix | pf | 4 | 130 |
| v7 | pf | 4 | 122 |
| bsd | pf | 4 | 121 |
| x11r4 | pf | 4 | 120 |
| php | pf | 4 | 116 |
| hpux | pf | 4 | 116 |
| osf1 | pf | 4 | 104 |
| suse | pf | 4 | 103 |
| opendarwin | pf | 4 | 102 |