| ID | Name | Type |
|---|---|---|
| #15603 | Z-Man | ? |
| #15604 | Z-Software | Z |
| #15605 | Z-Zero Systems | Z |
| #20814 | Z. Konba | + |
| #15606 | Z. Kosina | ? |
| #19248 | Z. Šedek | + |
| #20718 | Z.B. | - |
| #15607 | Z80 | Z |
| #15608 | Z80 Pros | Z |
| #21709 | Z80PiZAg | P |
| #16712 | ZAKZ | + |
| #15610 | ZB | ? |
| #15611 | ZC | ? |
| #15612 | ZK System | Z |
| #20804 | ZK-soft | P |
| #19177 | ZOSYA entertainment | P |
| #15613 | ZOTKS | ? |
| #15614 | ZS | ? |
| #15615 | ZSME | ? |
| #15617 | ZX Bugs | ? |