Видео с ютуба Mainframe Tutorial For Beginnger

COBOL in 100 seconds

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Руководство для начинающих по основным командам мэйнфреймов | Всё о мэйнфреймах

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

MainFrame Computers z/OS 01: Introduction and Setup

JCL Refresher in One Hour

DB2 Tutorial For Beginners on Mainframe (Crash Course)

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