| OS | Man Page | Section | Hits |
|---|---|---|---|
| linux | towupper | 3 | 134 |
| php | towupper | 3 | 125 |
| opendarwin | towupper | 3 | 124 |
| mojave | towupper | 3 | 122 |
| plan9 | towupper | 3 | 115 |
| xfree86 | towupper | 3 | 112 |
| freebsd | towupper | 3 | 111 |
| centos | towupper | 3 | 109 |
| v7 | towupper | 3 | 108 |
| osx | towupper | 3 | 106 |
| minix | towupper | 3 | 105 |
| opensolaris | towupper | 3 | 104 |
| bsd | towupper | 3 | 103 |
| x11r4 | towupper | 3 | 100 |
| suse | towupper | 3 | 93 |
| freebsd | towupper_l | 3 | 90 |
| linux | towupper_l | 3 | 86 |
| posix | towupper | 3p | 86 |
| sunos | towupper | 3c | 83 |
| debian | towupper | 3 | 82 |
| osx | towupper_l | 3 | 74 |
| osf1 | towupper | 3 | 70 |
| redhat | towupper | 3 | 70 |
| mojave | towupper_l | 3 | 64 |
| suse | towupper | 3p | 63 |
| netbsd | towupper | 3 | 50 |
| centos | towupper | 3p | 45 |
| hpux | towupper | 3c | 44 |