| ID | Name | Type |
|---|---|---|
| #14926 | Ultravideo Software | Z |
| #14927 | Umberto Eco | + |
| #14928 | Umer Nalla | ? |
| #20735 | Unai Ipaguirre | + |
| #21976 | Uncle Art | Z |
| #23054 | Undefined Crew | P |
| #20025 | Under4Mhz | - |
| #14929 | Underground Systems | Z |
| #20328 | Underhill Baptist Church | P |
| #19687 | Underlain | - |
| #14930 | Understanding Ltd | Z |
| #19822 | Undertaker | - |
| #19265 | Uni-Soft | P |
| #14931 | UniSoft | Z |
| #14932 | Unicom | ? |
| #22919 | Unicorn Micro Systems | Z |
| #14933 | Unicorn Research | Z |
| #14934 | Unicorn Soft | Z |
| #14935 | Unicorn Software | Z |
| #14936 | Unicornio Soft | Z |