Learning resources

https://bixoft.nl/english/selftest.htm
https://idcp.marist.edu/assembler-resources
https://www.ibm.com/docs/en/zos-basic-skills?topic=zos-assembler-language
https://www.ibm.com/support/pages/high-level-assembler-hlasm-and-toolkit-feature-share-presentations
http://www.billqualls.com/assembler/index.html
https://punctiliousprogrammer.com/
https://www.ibmmainframeforum.com/assembler/topic12399.html
https://ibmmainframes.com/about2744.html
http://planetmvs.com/hlasm/s390faq.html
https://share.confex.com/share/115/webprogram/Handout/Session7445/hla2mtf.pdf