COBOL Resource hub on IBM Developer
COBOL Fridays Replay videos and link to register for future events
YouTube Video: So you want to learn COBOL?
IBM Enterprise COBOL for z/OS Documentation Library - Full Reference Library of COBOL Manuals
IBM Enterprise COBOL for z/OS, Language Reference v6.3
IBM Language Environment Programming Reference v2r4 - Common subroutines callable from all IBM supported programming languages.
IBM Enterprise COBOL for z/OS, Messages and Codes v6.3
Installing Zowe CLI from an online registry
Installing Zowe CLI from source
An Introduction to the Zowe Virtual Desktop
IBM z/OS MVS JCL Reference v2r4
IBM z/OS Communications Server: IP User's Guide and Commands v2r4 - FTP Reference Manual
IBM z/OS TSO/E REXX Reference v2r4
Timeline and brief description of IBM Operating Systems. By Dave Morton, marspyrs. Dated: February, 2018
z/OS Introduction and Workshop for IT Professionals
Master the Mainframe - Get hands-on Experience Across a Variety of Technologies
Beginner’s Guide: COBOL Made Easy by Jessielaine Punongbayan
IBM DFSORT: ICETOOL Mini-User Guide - October, 2010 by Frank L. Yaeger
DFSORT′s Year 2000 Features (The New Generation) - October, 1998 by Frank L. Yaeger
IBM DFSORT Application Programming Guide v2r4 - Full Manual
Note: IBM DFSORT's ICETOOL can often replace the need to write COBOL program(s), when needing to (optionally) sort and tranform data contained in one or more input files to produce an output file. All user guides written by Frank L. Yaeger on this subject are excellent.
IBM Setting property groups | IBM Z® Open Editor
Want to become a Tech Entrepreneur? Here’s how I did it & you can too- Webinar - Originally broadcast: 2020-04-23 - 1 hour
Open Mainframe Project Website - The Linux Foundation Projects
IBM and Open Mainframe Project Mobilize to Connect States with COBOL Skills
Dr. David Woolbright's (COBOL Fridays: Presenter) Website
DB2 SQL Cookbook based upon the original work of Graeme Birchall:
DB2 SQL Cookbook - Original Archived PDF
Fake Your Way Through Minis and Mainframes - Including MVS (predecessor to z/OS)