| Abbreviation | Definition |
|---|---|
| XLR | Xtremely Large Robot |
| XMP | X Men Petz |
| XSE | Xavier Security Enforcers |
| XSE | X-treme Sanctions Executives |
| XSL | Xtreme Saiyan League |
| XT | Xanth Thread |
| XTC | Xarxet Trade Consortium |
| XW | Xena Warrior |
| XWA | X- Wing Alliance |
| XWM | Xena Warrior Milkmaid |
| YES | Your Excellency Succeeds |
| YIM | Yami Interview Man |
| YJK | Young Jedi Knights |
| YNS | Yllennocian Naval Ship |
| YO | The Year Of Obigon |
| YVH | Yuzhaan Vong Hunter |
| Z | Zartan |
| Z | Zombie |
| Z | Zork |
| ZA | Zero Army |