| Abbreviation | Definition |
|---|---|
| UGC | UnderGround Communications |
| UGD | Underground |
| UGLY | Understanding Generous Loveable You |
| UGLY | Understanding, Generous, Lovable, and Young |
| UGLY | Unique Goddess Loving Yourself |
| UGM | Usenet Group Mentors |
| UGMS | You Got Me Smiling |
| UGN | U Go Now |
| UGN | Utah Games Network |
| UGO | User Group Order |
| UGO | User Group Other |
| UGO | User Group Others |
| UGQ | User Group Query |
| UGRC | User Groups Resource Channel |
| UGS | Ugly |
| UGT | Usenet Good Traders |
| UGTBK | You've Got To Be Kidding |
| UGU | User Group University |
| UHC | Underground Hacking Council |
| UHG | Un- Happy Guy |