By Adolfo Kurt Ol… , 4 July 2025

Understanding the backbone of enterprise computing

When we talk about mission-critical systems in banking, airlines, or government, we're talking about mainframes. And at the core of many of these systems is z/OS, IBM's flagship mainframe operating system.

🖥️ What Is a Mainframe?

A mainframe is a powerful computer designed for:

  • High-volume transaction processing
  • Extreme reliability
  • Secure data handling

Unlike typical servers, mainframes can: