| OS | Man Page | Section | Hits |
|---|---|---|---|
| linux | ff | 1m | 1,374 |
| debian | ff | 1m | 801 |
| osx | ff | 1m | 765 |
| mojave | ff | 1m | 761 |
| minix | ff | 1m | 705 |
| redhat | ff | 1m | 702 |
| suse | ff | 1m | 701 |
| php | ff | 1m | 698 |
| freebsd | ff | 1m | 640 |
| hpux | ff | 1m | 635 |
| opendarwin | ff | 1m | 579 |
| sunos | ff | 1m | 576 |
| xfree86 | ff | 1m | 574 |
| centos | ff | 1m | 566 |
| v7 | ff | 1m | 556 |
| x11r4 | ff | 1m | 542 |
| opensolaris | ff | 1m | 514 |
| posix | ff | 1m | 506 |
| osf1 | ff | 1m | 473 |
| plan9 | ff | 1m | 420 |