Have you seen: https://www.ibm.com/docs/en/zos-basic-skills https://www.ibm.com/docs/en/zos-basic-skills I've no knowledge of IBM mainframes - but I assume the

Have you seen: https://www.ibm.com/docs/en/zos-basic-skills https://www.ibm.com/docs/en/zos-basic-skills I've no knowledge of IBM mainframes - but I assume they're sold as part of a large consultancy/training package.