Driving the Future of Mainframe Innovation | Mainframe Capacity Analysis

Why 21CS
Products
- Our Products
  - SENTINELⁿ
    Comprehensive change management tool for z/OS
  - STRATUSⁿ
    Cloud object storage for z/OS | 21CS
  - Tape/Assist®
    Seamlessly migrates z/OS tape data
  - TRANSVERSEⁿ
    End-to-end, non-disruptive z/OS data migration
  - VECTORⁿ
    Modern, simplified dataset transfers
  - VSEⁿ
    Enhanced VSE experience compatible with previous versions
- What's Next
  - VERIFIⁿ
    Modern, adaptable JCL checker
  - OPTIMAⁿ
    The next generation of mainframe performance analytics
- Trusted IBM Partner
  - IBM Product Portfolio
- 21CS Partners
  - Global Partnerships
AI for QA with Python and ZOAU for the Seasoned Professional

A 45-year z/OS veteran puts generative AI to work with Python and ZOAU, automating a QA task across ...
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Solutions
- Our Solutions
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Partner with experts who understand mainframe challenges and opportunities.
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Rethinking Performance Management on IBM Z in the Age of AI
By Josh Stiles, Product Lead, 21st Century Software

Real Time Performance & Cost Control
July 2, 2026
21CS Announces OPTIMAn
The IBM Z Intelligence Gap Is Closing For decades, mainframe teams have been trapped in the same cycle: pull reports, wait for answers, make decisions on data that's already aging. The platform is...

Mainframe AI Integration
July 1, 2026