| OS | Man Page | Section | Hits |
|---|---|---|---|
| linux | ff | 1m | 798 |
| debian | ff | 1m | 493 |
| osx | ff | 1m | 486 |
| mojave | ff | 1m | 470 |
| redhat | ff | 1m | 455 |
| php | ff | 1m | 438 |
| suse | ff | 1m | 422 |
| minix | ff | 1m | 411 |
| hpux | ff | 1m | 387 |
| sunos | ff | 1m | 382 |
| freebsd | ff | 1m | 348 |
| opensolaris | ff | 1m | 339 |
| x11r4 | ff | 1m | 331 |
| opendarwin | ff | 1m | 331 |
| xfree86 | ff | 1m | 327 |
| centos | ff | 1m | 323 |
| posix | ff | 1m | 301 |
| v7 | ff | 1m | 293 |
| osf1 | ff | 1m | 267 |
| plan9 | ff | 1m | 244 |