| OS | Man Page | Section | Hits |
|---|---|---|---|
| opensolaris | towupper | 3 | 343 |
| mojave | towupper | 3 | 325 |
| centos | towupper | 3 | 320 |
| linux | towupper | 3 | 316 |
| php | towupper | 3 | 308 |
| minix | towupper | 3 | 307 |
| osx | towupper | 3 | 282 |
| xfree86 | towupper | 3 | 281 |
| opendarwin | towupper | 3 | 280 |
| plan9 | towupper | 3 | 277 |
| v7 | towupper | 3 | 275 |
| x11r4 | towupper | 3 | 274 |
| bsd | towupper | 3 | 266 |
| suse | towupper | 3 | 260 |
| debian | towupper | 3 | 248 |
| posix | towupper | 3p | 229 |
| freebsd | towupper | 3 | 226 |
| freebsd | towupper_l | 3 | 211 |
| mojave | towupper_l | 3 | 207 |
| sunos | towupper | 3c | 197 |
| suse | towupper | 3p | 194 |
| osx | towupper_l | 3 | 194 |
| centos | towupper | 3p | 183 |
| linux | towupper_l | 3 | 180 |
| redhat | towupper | 3 | 179 |
| osf1 | towupper | 3 | 171 |
| hpux | towupper | 3c | 132 |
| netbsd | towupper | 3 | 113 |