Mainframe Courses

Mainframe - Crucial Role in Modern Enterprise Computing
openHPI

Getting Started on Mainframe with z/OS Commands and Panels
IBM via Coursera

IBM z/OS Mainframe Practitioner
IBM via Coursera

Mainframe: The Complete JCL Course from Beginner to Expert
Udemy

Mainframe: The Complete COBOL Course From Beginner To Expert
Udemy

Introduction to IBM z/OS Mainframe
IBM via edX

IBM z/OS Mainframe Practitioner
IBM via edX

Mainframe COBOL
YouTube

Mainframe COBOL Tutorial
YouTube

The Complete Job Control Language (JCL) Course.
Udemy