- Ulster Defence Regiment
- Ulster Unionist Party
- Ultima Online
- ultimate
- Ultimate High Quality CD
- ULTIMATE WHEELS
- Ultima Thule
- Ultima Thule
- ultimatum
- ultimatum
- ultra
- Ultra ATA
- Ultra ATA
- Ultra ATA
- Ultra ATA/100
- Ultra ATA/133
- Ultra ATA/33
- Ultra ATA/66
- Ultrabook
- ultracapacitor
- ultra-diffuse galaxy
- Ultra DMA
- Ultra DMA/100
- Ultra DMA/133
- Ultra DMA/33