| Z | Impedance |
| ZAF | Z-axis Adhesive Film |
| ZAP | Zone Axis Pattern |
| ZETAA | Zero Energy Thermo-nuclear Assembly of Apparatus |
| ZFC | Zero Field Cooling |
| ZIF | Zero Insertion Force |
| ZIP | Zigzag Inline Package; Archived file format |
| ZPL | Zero Phonon Line |
| ZT | Total impedance |
| Zepto | 10^-21 |
| Zeta | 10^21 |
| Zin | Input impedance |
| Zn | Zinc |
| Zo | Output impedance |
| Zp | Primary impedance |
| Zs | Secondary impedance |
