Видео с ютуба Mainframe Basics

What are Mainframes?

COBOL in 100 seconds

Mainframe - Overview

What is a Mainframe? The Ultimate Guide to the World's Most Powerful Computing Platform. #podcast

Mainframe Myths Debunked in 5 Minutes

A beginner’s guide to basic mainframe commands | All About mainframes

Mainframe Training - Mainframe Basics Overview - MAINFRAME TRAINING CHANNEL

JCL Refresher in One Hour

What is Mainframe Computer | Introduction to Mainframe | How to become a Mainframe programmer?

IBM Mainframe Basics

JCL Tutorial | JCL Complete Reference | JCL Complete Tutorial | JCL Course | Mainframe JCL Tutorial.