| z/OS | OS/360 operating system version 
| Others |
| z/OS | zSeries 900 Operating System
| Others |
| Z/W | Zaraz Wracam
| Others |
| Z001 | Gjirokaster, Albania
| Others |
| Z00A | Bagram, Afghanistan
| Others |
| Z00H | Tirana-Lapraka, Albania
| Others |
| Z02D | Two Rivers, Botswana
| Others |
| Z02E | Cobija Old, Bolivia
| Others |
| Z02O | Abaete, Brazil
| Others |
| Z06Z | Nova Ponte, Brazil
| Others |
| Z07G | Tsalapita, Bulgaria
| Others |
| Z07H | Silistra Polkovnik Lambrinovo, Bulgaria
| Others |
| Z07I | Radomir Dolni Rakovets AB, Bulgaria
| Others |
| Z07J | Uzundzhovo, Bulgaria
| Others |
| Z07K | Gabrovnitsa, Bulgaria
| Others |
| Z07M | Ostrovo Northwest, Bulgaria
| Others |
| Z07O | Tenevo, Bulgaria
| Others |
| Z07P | Zimnitsa, Bulgaria
| Others |
| Z07Q | Kumaritsa, Bulgaria
| Others |
| Z07R | Graf Ignatevo, Bulgaria
| Others |
| Z07S | Stanke Dimitroy, Bulgaria
| Others |
| Z07T | Cheshnegirovo, Bulgaria
| Others |
| Z07U | Malevo, Bulgaria
| Others |
| Z07V | Podem, Bulgaria
| Others |
| Z07W | Veren, Bulgaria
| Others |
| Z07X | Maslarevo, Bulgaria
| Others |
| Z07Y | Stryama, Bulgaria
| Others |
| Z07Z | Levski, Bulgaria
| Others |
| Z08A | Konush, Bulgaria
| Others |
| Z08B | Leskovo, Bulgaria
| Others |
| Z08C | Stefanovo, Bulgaria
| Others |
| Z08D | Golyama Smolnitsa, Bulgaria
| Others |
| Z08E | Sokolovo, Bulgaria
| Others |
| Z08F | Graf Ignatievo South, Bulgaria
| Others |
| Z08G | Lefka, Bulgaria
| Others |
| Z08H | Vidin Smurdan, Bulgaria
| Others |
| Z08I | Dolna Mitropoliya, Bulgaria
| Others |
| Z08J | Kamenets, Bulgaria
| Others |
| Z08L | Bezmer, Bulgaria
| Others |
| Z08M | Ravnets, Bulgaria
| Others |
| Z08N | Petrich, Bulgaria
| Others |
| Z1 | ZoneAlarm File
| Others |
| Z10 | Zastava Deset
| Others |
| Z11D | Rotimojoki Highway Strip, S-Finland
| Others |
| Z11E | Vuojarvi Highway Strip, S-Finland
| Others |
| Z11F | Alavus Highway Strip, S-Finland
| Others |
| Z11G | Jarvitalo Highway Strip, S-Finland
| Others |
| Z11K | Juterborg, S-Germany
| Others |
| Z11L | Leipheim, S-Germany
| Others |
| Z11M | Brandis, S-Germany
| Others |