| OS | Man Page | Section | Hits |
|---|---|---|---|
| linux | fdio | 7i | 69 |
| freebsd | fdio | 7i | 63 |
| sunos | fdio | 7i | 57 |
| opensolaris | fdio | 7i | 47 |
| redhat | fdio | 7i | 46 |
| php | fdio | 7i | 37 |
| bsd | fdio | 7i | 36 |
| minix | fdio | 7i | 34 |
| v7 | fdio | 7i | 34 |
| posix | fdio | 7i | 32 |
| xfree86 | fdio | 7i | 31 |
| osx | fdio | 7i | 30 |
| mojave | fdio | 7i | 30 |
| x11r4 | fdio | 7i | 29 |
| opendarwin | fdio | 7i | 28 |
| centos | fdio | 7i | 27 |
| hpux | fdio | 7i | 26 |
| suse | fdio | 7i | 24 |
| debian | fdio | 7i | 21 |
| plan9 | fdio | 7i | 21 |