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2026 Rising Stars Nominations Are Now Open

The TechChannel initiative recognizes those who are new to their platform but are already making an impact

REXX Execution Explained: Explicit, Implicit and Batch

New-to-Z systems engineer Stephen Johnston explains the three primary ways to run REXX on z/OS, something that's not immediately obvious to new mainframers

IBM’s First Dual-Architecture Mainframe Processor Brings Arm Technology to Z and LinuxONE

As the first product of the companies’ new partnership, the next-generation processor will vastly expand software options on the mainframe

Clearing Up IBM Technologists’ Biggest Misconceptions About AWS (and Vice Versa)

James Roarty, chief cloud officer at Lightedge, has seen things from both sides, explaining how he went from being 'all in on cloud' to a more nuanced view

Modernize the Application, Not Necessarily the Platform

Craig Mullins illustrates why mainframe application modernization should begin with business requirements, not a migration mandate

Solving a Six-Decade-Old Problem

Many of the world’s most critical business applications run as CICS transactions against VSAM files. Banks depend on that combination for ATMs and teller systems, insurers for claims, airlines for reservations, manufacturers for inventory control, and governments for tax filings. These applications work. They are fast, proven, and full of business rules nobody wants to […]

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IBM’s Mainframe Certificate Course Is Full of Surprises, Even for a ‘Grayframer’

Veteran mainframer Bruce McKnight discovers the value of re-examining platform fundamentals with fresh eyes

Options for Dynamically Increasing LUN Sizes

Rob McNelly explains the process of mapping storage through VIOS to IBM i partitions

Joseph Gulla’s New Book, ‘A Mainframe Computing Reader’ Available June 26

Originally appearing as a series of TechChannel articles, "A Mainframe Computing Reader" is for those new to the platform as well as technologists who want to update their knowledge

Why Mainframe Data Is Becoming the Most Valuable Data in the Enterprise

Craig Mullins outlines the factors that make mainframe data a strategic asset, including operational discipline, data gravity and AI readiness