| OS | Man Page | Section | Hits |
|---|---|---|---|
| linux | re | 3erl | 623 |
| freebsd | re | 4 | 621 |
| redhat | re | 3pm | 505 |
| opensolaris | re | 1 | 464 |
| x11r4 | re | 1 | 455 |
| plan9 | re | 1 | 443 |
| osf1 | re | 7 | 442 |
| posix | re | 1 | 433 |
| bsd | re | 1 | 433 |
| minix | re | 1 | 429 |
| osx | re | 3pm | 419 |
| mojave | re | 3pm | 416 |
| opendarwin | re | 1 | 412 |
| xfree86 | re | 1 | 395 |
| debian | re | 4 | 394 |
| php | re | 1 | 392 |
| debian | re | 1 | 384 |
| v7 | re | 1 | 378 |
| netbsd | re | 4 | 369 |
| hpux | re | 1 | 368 |
| centos | re | 3pm | 362 |
| suse | re | 3pm | 349 |
| debian | re | 3perl | 276 |