COBOL & Z Server

For the love of bare metal machines.

June 2026

COBOL 101: Hello World, Taxes, and Why Mainframes Hate Prompts

2026-06-05

Part 1 of our COBOL series. Learn how to write and compile your first COBOL programs locally using GnuCOBOL, and understand the fundamental difference between interactive apps and Mainframe JCL batch processing.

May 2026

First Steps on the Mainframe

2026-05-15

What it feels like to finally sit in front of a z/OS system and realise that most of the modern world runs on hardware nobody talks about.

The Predictable Beauty of COBOL and JCL