| OS | Man Page | Section | Hits |
|---|---|---|---|
| linux | ff | 1m | 96 |
| sunos | ff | 1m | 88 |
| opensolaris | ff | 1m | 82 |
| hpux | ff | 1m | 62 |
| redhat | ff | 1m | 58 |
| freebsd | ff | 1m | 53 |
| php | ff | 1m | 53 |
| osx | ff | 1m | 52 |
| mojave | ff | 1m | 50 |
| minix | ff | 1m | 47 |
| debian | ff | 1m | 44 |
| x11r4 | ff | 1m | 34 |
| suse | ff | 1m | 34 |
| centos | ff | 1m | 33 |
| osf1 | ff | 1m | 33 |
| opendarwin | ff | 1m | 32 |
| posix | ff | 1m | 29 |
| v7 | ff | 1m | 27 |
| xfree86 | ff | 1m | 25 |
| plan9 | ff | 1m | 6 |