| Abbreviation | Definition |
|---|---|
| XSS | Cross-Site Scripting |
| YAPS | Yet Another Port Scanner |
| ZADIR | Zero Assumption Digital Image Recovery |
| ZAM | Zone Announcement Message |
| ZC | Zone Checker |
| ZC | Zone Controller |
| ZCM | Zone Convexity Message |
| ZCR | Zone Checkers Room |
| ZEN | Zero Effort Network |
| ZIL | Zork Implementation Language |
| ZKP | Zero-Knowledge with Public keys |
| ZLE | Zone Limit Exceeded |
| ZM | Zone Management |
| ZS | Zone System |
| ZSK | Zone Signing Key |