| OS | Man Page | Section | Hits |
|---|---|---|---|
| opensolaris | towupper | 3 | 465 |
| mojave | towupper | 3 | 435 |
| centos | towupper | 3 | 429 |
| linux | towupper | 3 | 401 |
| minix | towupper | 3 | 388 |
| php | towupper | 3 | 376 |
| opendarwin | towupper | 3 | 365 |
| xfree86 | towupper | 3 | 364 |
| osx | towupper | 3 | 360 |
| bsd | towupper | 3 | 358 |
| v7 | towupper | 3 | 355 |
| x11r4 | towupper | 3 | 349 |
| plan9 | towupper | 3 | 346 |
| suse | towupper | 3 | 344 |
| posix | towupper | 3p | 320 |
| debian | towupper | 3 | 310 |
| freebsd | towupper | 3 | 291 |
| mojave | towupper_l | 3 | 269 |
| sunos | towupper | 3c | 268 |
| centos | towupper | 3p | 261 |
| freebsd | towupper_l | 3 | 257 |
| suse | towupper | 3p | 256 |
| osx | towupper_l | 3 | 255 |
| redhat | towupper | 3 | 248 |
| linux | towupper_l | 3 | 241 |
| osf1 | towupper | 3 | 236 |
| hpux | towupper | 3c | 184 |
| netbsd | towupper | 3 | 146 |