| OS | Man Page | Section | Hits |
|---|---|---|---|
| freebsd | re | 4 | 568 |
| linux | re | 3erl | 510 |
| redhat | re | 3pm | 413 |
| x11r4 | re | 1 | 408 |
| opensolaris | re | 1 | 396 |
| osf1 | re | 7 | 385 |
| bsd | re | 1 | 378 |
| opendarwin | re | 1 | 369 |
| posix | re | 1 | 368 |
| osx | re | 3pm | 368 |
| plan9 | re | 1 | 364 |
| minix | re | 1 | 360 |
| mojave | re | 3pm | 359 |
| debian | re | 4 | 355 |
| xfree86 | re | 1 | 336 |
| debian | re | 1 | 329 |
| v7 | re | 1 | 325 |
| php | re | 1 | 322 |
| centos | re | 3pm | 320 |
| hpux | re | 1 | 316 |
| suse | re | 3pm | 313 |
| netbsd | re | 4 | 312 |
| debian | re | 3perl | 230 |