| OS | Man Page | Section | Hits |
|---|---|---|---|
| linux | vr | 4 | 373 |
| freebsd | vr | 4 | 349 |
| redhat | vr | 4 | 321 |
| debian | vr | 4 | 308 |
| php | vr | 4 | 277 |
| netbsd | vr | 4 | 271 |
| minix | vr | 4 | 267 |
| osx | vr | 4 | 259 |
| centos | vr | 4 | 255 |
| plan9 | vr | 4 | 255 |
| v7 | vr | 4 | 252 |
| opensolaris | vr | 4 | 251 |
| xfree86 | vr | 4 | 247 |
| suse | vr | 4 | 229 |
| bsd | vr | 4 | 228 |
| posix | vr | 4 | 209 |
| x11r4 | vr | 4 | 207 |
| osf1 | vr | 4 | 184 |
| hpux | vr | 4 | 169 |