| OS | Man Page | Section | Hits |
|---|---|---|---|
| linux | ff | 1m | 236 |
| sunos | ff | 1m | 169 |
| redhat | ff | 1m | 133 |
| php | ff | 1m | 132 |
| osx | ff | 1m | 131 |
| opensolaris | ff | 1m | 124 |
| mojave | ff | 1m | 121 |
| debian | ff | 1m | 120 |
| minix | ff | 1m | 113 |
| hpux | ff | 1m | 106 |
| suse | ff | 1m | 89 |
| freebsd | ff | 1m | 86 |
| xfree86 | ff | 1m | 74 |
| opendarwin | ff | 1m | 71 |
| centos | ff | 1m | 71 |
| x11r4 | ff | 1m | 69 |
| posix | ff | 1m | 64 |
| v7 | ff | 1m | 60 |
| osf1 | ff | 1m | 53 |
| plan9 | ff | 1m | 37 |