| OS | Man Page | Section | Hits |
|---|---|---|---|
| linux | re | 3erl | 759 |
| freebsd | re | 4 | 721 |
| redhat | re | 3pm | 589 |
| osf1 | re | 7 | 573 |
| x11r4 | re | 1 | 558 |
| opensolaris | re | 1 | 547 |
| plan9 | re | 1 | 547 |
| bsd | re | 1 | 534 |
| posix | re | 1 | 529 |
| minix | re | 1 | 524 |
| opendarwin | re | 1 | 503 |
| mojave | re | 3pm | 501 |
| php | re | 1 | 496 |
| debian | re | 1 | 496 |
| osx | re | 3pm | 493 |
| xfree86 | re | 1 | 487 |
| v7 | re | 1 | 482 |
| debian | re | 4 | 466 |
| hpux | re | 1 | 462 |
| netbsd | re | 4 | 453 |
| centos | re | 3pm | 446 |
| suse | re | 3pm | 433 |
| debian | re | 3perl | 332 |