| Acronym | Meaning |
| ZANU | PF -Zimbabwe African National Union - Patriotic Front |
| ZAR | South African Rand (ISO 4217 Currency Code) - Zaire (ISO 3166 Trigram |
| ZAS | Zylinder Abschaltung System |
| ZBT | Zero-Balance Transfer (accounting) |
| ZC | Zeptocoulomb |
| ZC | Zettacoulomb |
| ZCU | Zimbabwe Cricket Union |
| ZF | Zeptofarad |
| ZF | Zettafarad |
| ZG | Zeptogram |
| ZG | Zettagram |
| ZH | Chinese Language (ISO 639-1 Code) |
| ZH | Zeptohenry |
| ZH | Zettahenry |
| ZHA | Zhuang Language (ISO 639-2 Code) |
| ZHO | Chinese Language (ISO 639-2 Code) |
| ZI | Zebi |
| ZI | Zimbabwe (FIPS 10-4 Country Code) |
| ZIP | Zoning Improvement Plan Code |
| ZJ | Zeptojoule |
| ZJ | Zettajoule |
| ZK | Zeptokelvin |
| ZK | Zettakelvin |
| ZL | Zeptolitre |
| ZL | Zettalitre |
| ZM | Zambia (ISO 3166 Digram) |
| ZM | Zeptometre |
| ZM | Zettametre |
| ZMB | Zambia (ISO 3166 Trigram) |
| ZMK | Zambian Kwacha (ISO 4217 Currency Code) |
| ZN | Zeptonewton |
| ZN | Zettanewton |
| ZN | Zinc |
| ZOPFAN | Zone Of Peace |
| ZR | Zaire (ISO 3166 Digram; Obsolete 1997) |
| ZR | Zirconium |
| ZS | Zeptosecond |
| ZS | Zettasecond |
| ZS | Zettasiemens |
| ZT | Zeptotesla |
| ZT | Zettatesla |
| ZU | Zulu Language (ISO 639-1 Code) |
| ZUG | Z User Group |
| ZUI | Zooming User Interface (zoo-wee) |
| ZUL | Zulu Language (ISO 639-2 Code) |
| ZV | Zeptovolt |
| ZV | Zettavolt |
| ZW | Zeptowatt |
| ZW | Zettawatt - Zimbabwe (ISO 3166 Digram) |
| ZWD | Zimbabwe Dollar (ISO 4217 Currency Code) |