If you locate a genuine copy (version 2.0 or 3.0 are the most common), you will find the following modules:
Despite its legendary status, the "Muthu Refresher" is not an official IBM publication. It is a community-driven study guide, typically attributed to a mainframe expert named Muthu (often associated with the Mainframe Guru or Muthu’s Mainframe Training forums). mainframe refresher by muthu pdf
The document serves as a rapid revision guide—a condensed cheat sheet covering the essential pillars of mainframe computing. Unlike the massive, thousand-page IBM redbooks, this PDF is usually 50 to 100 pages long, designed to be read over a weekend or during a commute. If you locate a genuine copy (version 2
If you get a genuine copy, follow this 3-day study plan: thousand-page IBM redbooks