Mainframe -OS/390 and ZO/s difference – Srinimf

This question asked for many mainframe programmers. They are unable to tell correct answer. For your benefit I am giving the basic difference.

OS/390:

This architecture runs under 32 BIT address space

Z/OS:

This architecture runs under 64-BIT address space.

Srini

Data Engineer with deep AI and Generative AI expertise, crafting high-performance data pipelines in PySpark, Databricks, and SQL. Skilled in Python, AWS, and Linux—building scalable, cloud-native solutions for smart applications.

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