| OS | Man Page | Section | Hits |
|---|---|---|---|
| redhat | pf | 4 | 1,552 |
| centos | pf | 4 | 1,407 |
| linux | pf | 4 | 559 |
| freebsd | pf | 4 | 437 |
| netbsd | pf | 4 | 327 |
| osx | pf | 4 | 278 |
| mojave | pf | 4 | 266 |
| debian | pf | 4 | 264 |
| plan9 | pf | 4 | 262 |
| opensolaris | pf | 4 | 219 |
| php | pf | 4 | 216 |
| v7 | pf | 4 | 210 |
| xfree86 | pf | 4 | 208 |
| minix | pf | 4 | 205 |
| bsd | pf | 4 | 201 |
| x11r4 | pf | 4 | 195 |
| suse | pf | 4 | 193 |
| osf1 | pf | 4 | 187 |
| hpux | pf | 4 | 181 |
| opendarwin | pf | 4 | 166 |