| OS | Man Page | Section | Hits |
|---|---|---|---|
| minix | fd | 4 | 341 |
| freebsd | fd | 4 | 325 |
| bsd | fd | 4 | 311 |
| linux | fd | 4 | 282 |
| osx | fd | 4 | 277 |
| x11r4 | fd | 1 | 252 |
| debian | fd | 4 | 238 |
| centos | fd | 4 | 235 |
| mojave | fd | 4 | 235 |
| suse | fd | 4 | 233 |
| redhat | fd | 4 | 230 |
| debian | fd | 1 | 219 |
| osf1 | fd | 4 | 202 |
| hpux | fd | 1 | 199 |
| netbsd | fd | 4 | 197 |
| v7 | fd | 1 | 196 |
| php | fd | 1 | 193 |
| posix | fd | 1 | 193 |
| opensolaris | fd | 7d | 189 |
| opendarwin | fd | 4 | 187 |
| plan9 | fd | 1 | 184 |
| osf1 | fd | 7 | 178 |
| xfree86 | fd | 1 | 177 |
| sunos | fd | 7d | 171 |
| sunos | fd | 4 | 136 |
| opensolaris | fd | 4 | 90 |