| OS | Man Page | Section | Hits |
|---|---|---|---|
| linux | sf | 4 | 564 |
| redhat | sf | 4 | 551 |
| opensolaris | sf | 7d | 499 |
| php | sf | 4 | 456 |
| minix | sf | 4 | 454 |
| suse | sf | 4 | 447 |
| debian | sf | 4 | 444 |
| mojave | sf | 4 | 444 |
| netbsd | sf | 4 | 440 |
| centos | sf | 4 | 437 |
| osx | sf | 4 | 433 |
| freebsd | sf | 4 | 425 |
| plan9 | sf | 4 | 400 |
| v7 | sf | 4 | 385 |
| x11r4 | sf | 4 | 384 |
| xfree86 | sf | 4 | 357 |
| bsd | sf | 4 | 351 |
| sunos | sf | 7d | 338 |
| posix | sf | 4 | 309 |
| osf1 | sf | 4 | 245 |
| hpux | sf | 4 | 230 |