COBOL.fyi
The industry standard source for COBOL and mainframes
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Why 95% of ATM Transactions in the US Still Run on COBOL
IBM vs Claude Code: COBOL Modernization
How to Prioritize Which COBOL Components to Modernize First
Hidden risks of COBOL migration: Implicit dependencies and shared state
What AI Can (and Can't) Do in a COBOL Modernization Project
How to Build a Strangler Fig Pattern Around a COBOL Batch Job
Originals
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Why 95% of ATM Transactions in the US Still Run on COBOL
IBM vs Claude Code: COBOL Modernization
How to Prioritize Which COBOL Components to Modernize First
Hidden risks of COBOL migration: Implicit dependencies and shared state
What AI Can (and Can't) Do in a COBOL Modernization Project
How to Build a Strangler Fig Pattern Around a COBOL Batch Job
How to Write Unit Tests for COBOL Programs That Have Never Had Any
How to Identify and Isolate Shared State Before Touching a COBOL Module
Industry News
View AllIBM: Big Blue Sees Red Hat; Mainframe Headwinds, Software Tailwinds
International Business Machines is a Buy, appearing fairly valued after a sharp drop driven by a 42% Q2'26 mainframe sales decline. Click for more on IBM stock.
IBM’s Strengths Are The Reason to Buy Today at $234
IBM just posted its worst mainframe quarter in years, a securities fraud inquiry is hanging over management, and the stock sits nearly 20% below its 52-week high. So why are the franchise's most ...
DLA moves its catalog system off a 35-year-old COBOL platform
Adarryl Roberts, DLA’s CIO, said the catalog platform is part of a 10-year IT modernization strategy that implements capabilities in short sprints.
Why mainframe security requires continuous verification
For organizations that depend on the mainframe, adopting continuous analysis can help identify, reduce, and address risk.
Google Cloud: Mainframe modernization with four building blocks
Google offers iterative modernization of mainframe applications to the cloud, supported by AI for analysis and transformation.