| OS | Man Page | Section | Hits |
|---|---|---|---|
| linux | towupper | 3 | 88 |
| opendarwin | towupper | 3 | 70 |
| freebsd | towupper | 3 | 68 |
| mojave | towupper | 3 | 66 |
| php | towupper | 3 | 65 |
| centos | towupper | 3 | 63 |
| xfree86 | towupper | 3 | 61 |
| v7 | towupper | 3 | 61 |
| linux | towupper_l | 3 | 57 |
| plan9 | towupper | 3 | 57 |
| sunos | towupper | 3c | 57 |
| freebsd | towupper_l | 3 | 56 |
| bsd | towupper | 3 | 54 |
| osx | towupper | 3 | 54 |
| redhat | towupper | 3 | 53 |
| opensolaris | towupper | 3 | 52 |
| minix | towupper | 3 | 51 |
| suse | towupper | 3 | 48 |
| x11r4 | towupper | 3 | 47 |
| posix | towupper | 3p | 45 |
| osx | towupper_l | 3 | 41 |
| debian | towupper | 3 | 40 |
| osf1 | towupper | 3 | 37 |
| netbsd | towupper | 3 | 34 |
| mojave | towupper_l | 3 | 33 |
| suse | towupper | 3p | 28 |
| hpux | towupper | 3c | 23 |
| centos | towupper | 3p | 21 |