| OS | Man Page | Section | Hits |
|---|---|---|---|
| linux | sf | 4 | 448 |
| redhat | sf | 4 | 411 |
| php | sf | 4 | 363 |
| opensolaris | sf | 7d | 362 |
| minix | sf | 4 | 353 |
| debian | sf | 4 | 347 |
| suse | sf | 4 | 344 |
| netbsd | sf | 4 | 339 |
| centos | sf | 4 | 337 |
| osx | sf | 4 | 337 |
| freebsd | sf | 4 | 332 |
| mojave | sf | 4 | 320 |
| plan9 | sf | 4 | 315 |
| v7 | sf | 4 | 294 |
| xfree86 | sf | 4 | 284 |
| x11r4 | sf | 4 | 271 |
| posix | sf | 4 | 251 |
| bsd | sf | 4 | 243 |
| sunos | sf | 7d | 237 |
| osf1 | sf | 4 | 190 |
| hpux | sf | 4 | 174 |