Mainframe Open Education Project
  • Welcome: Learn & Contribute to MOE
    • MOE Vision, Mission and Content Phases
    • Who Can Contribute?
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    • Why MOE
  • Introduction: What is Enterprise Computing?
  • Chapter 1: What is a Mainframe Today?
    • Role of the Mainframe Today
      • Mainframe and the Cloud
      • Enterprise Computing
      • Hybrid Cloud
    • Who Uses the Mainframe and Why
    • Mainframe versus Server
    • Mainframe Basic Architecture & Components
    • How the Mainframe Works
    • Mainframe Security Myths
    • Mainframe Evolution
    • Mainframe Modernization
    • Video: ITs Best Kept Secret
    • Get Ready: Talk Like a Mainframer
    • Looking Back: The First 50 Years of Mainframe
  • Chapter 2: Foundational Technology
    • Brief Introduction to z/OS
    • TSO/E, ISPF, and UNIX System Services (USS): Interactive facilities of z/OS
    • Data Sets and How They Work
    • Job Control Language and System Display and Search Facility
      • Understanding the JCL(Job Control Language)
        • Understanding the JOB Statement
        • Understanding the EXEC Statement
        • Understanding the DD Statement
        • Creating a Physical Sequential (PS)
        • Understanding Libraries in JCL
        • Understanding Instream Procedures, Cataloged Procedures, and Symbolic Parameters in JCL
      • Utilities
        • IEBCOMPR
        • IEBGENER
          • Copying Between Sequential Datasets and PDS Members Using IEBGENER
          • Generate PDS member while copying
          • Copying a UNIX File to a PS File
        • IEBCOPY
          • IEBCOPY selective copy using select statements
          • IEBCOPY Exclude members while copying
          • IEBCOPY renaming member while copying
      • GDG
        • GDG parameters
        • GDG base
        • GDG Generation
          • Referencing GDG Generations Using Relative Numbers
        • Alter and Delete GDG
    • Enterprise Software Development and Implementation
    • Programming languages for Mainframe
    • Modern Application Management
    • Video: System Overview
    • Video: MVS Using Dynamic Allocations
    • Article: Red Hat OpenShift 4.7 on IBM Z Is a Game Changer for Container Orchestration and Managemen
    • IBM z16
  • Chapter 3: Roles in Mainframe
    • Roles and Categories
      • Category Definitions
  • Chapter 4: Deeper Dive in Role Chosen
    • IT Operations and System Support and Services
    • IT Business/Software Product Application Development and Support
    • IT Software Engineers
    • IT Architects
  • Chapter 5: Career Path Opportunities
    • Learning Programs
    • Job Opportunities
    • Career Event Calendar
    • Open to Hire
  • Mainframe Events and Conferences 2024
  • My Mainframe Journey: From Student to Professional
  • Backlog on Topics
  • Additional Community Resources
    • Communities
    • Courses, Tutorials, Manuals
    • Education Programs
    • IBM Mainframe Timeshare Services
  • Digital Certificate Badges
    • z/OS Mainframe Practitioner
  • Reviewer List
  • Modern Mainframe
    • What is a modern mainframe environment?
    • z/OSMF
      • What is z/OSMF?
      • Why it is important in a mainframe shop
      • z/OSMF Learning Materials
    • Zowe
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  1. Chapter 1: What is a Mainframe Today?

Who Uses the Mainframe and Why

Learn how and why mainframe is used by businesses.

PreviousHybrid CloudNextMainframe versus Server

Last updated 12 months ago

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You might not know the mainframe, however, it is part of your daily routine. Chances are you are not a direct user of mainframes. Still, you are an end user of most of the financial, enterprise, retail, and data management transactions that are taking place throughout the day. Given how competitive markets are and the wide variety of services/providers available to clients, one unavailability or transaction denied might be a trigger for a client to switch for good to another competitor.

Let's imagine a practical example from an end user perspective: as a consumer, you probably hold more than a credit card - still you have your favorite option used on a regular base. If you happen to experience a situation where your main card does not complete a transaction in an important moment, you tend to offer one of your other cards. If the new transaction process works well, you get satisfied - and chances are high that you will keep using this card which delivers a smooth purchase experience. Imagine now the other side of this story: would you like to be the company whose transaction experienced problems? This is definitely a bad nightmare scenario for a transaction credit card company.

All types and sizes of businesses and organizations can leverage mainframe as the foundation technology to support their business, specially for their mission-critical applications. The most common are:

  • Big organizations that manage enterprise-wide mission-critical ERP operations

  • Banks that handle trillions of transactions

  • Backend operations of many digital applications

We invite you to watch the video below to understand why enterprises use the mainframe, the key differences between the mainframe and other platforms, and the different roles and personas in the mainframe world. It shows you the enduring significance of the mainframe in technology's evolving landscape, showcasing its resilience and pivotal role in today's business strategies. With a staggering 76 percent acknowledgment from business leaders and projections indicating a robust 63 percent growth in MIPS, the mainframe remains a foundational element in IT.

Amid the dynamic digital economy, mainframes support the exponential growth of mobile transactions, playing a pivotal role in diverse industries' success. Digital disruptors leveraging mainframes generate 2.5 times more profit, solidifying the mainframe as a cornerstone of innovation and efficiency in the digital age.

Watch the video below and use the following questions for your guidance:

  1. How do recent survey results reflect the current perception of mainframes among business leaders, and what factors contribute to the sustained importance of mainframes in the evolving IT landscape?

  2. In what ways does the IBM Z13 contribute to the enduring success of mainframes, and how do global studies, particularly those with over 324,000 IT customers, emphasize the efficiency and economic advantages of mainframes in large-scale business computing?

  3. Explore the studies conducted by Dr. Howard Rubin regarding mainframes, focusing on their environmental impact, cost-effectiveness, and comparative advantages over distributed servers. How do these findings challenge common misconceptions and contribute to the ongoing reliance on mainframes in various industries?

Understand why enterprises use the mainframe, the key differences between the mainframe and other platforms, and the different roles and personas in the mainframe world.