Word.ws English Dictionary

z/OS

z/OS proper noun: a 64-bit operating system for IBM's z/Architecture mainframes, introduced in 2000.

Proper noun

z/OS

  1. (IBM) a 64-bit operating system for IBM's z/Architecture mainframes, introduced in 2000.

Questions about z/OS

What does z/OS mean?
Z/OS means a 64-bit operating system for IBM's z/Architecture mainframes, introduced in 2000.
What part of speech is z/OS?
Z/OS is a proper noun.

Words near z/OS in the dictionary

  1. z-variants
  2. z-word
  3. z-words
  4. Z.G.
  5. z.l.
  6. z/OS
  7. za
  8. za'atar
  9. za'tar
  10. zaa
  11. zaalouk

Source and license

Adapted from Wiktionary: z/OS (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated:

Cite this entry: “z/OS.” Word.ws, https://word.ws/z%2Fos. Based on Wiktionary, CC BY-SA 4.0.