This is a good article on the subject: https://arstechnica.com/information-technology/2023/07/the-ibm-mainframe-how-it-runs-and-why-it-survives/ https://arstech

This is a good article on the subject: https://arstechnica.com/information-technology/2023/07/the-ibm-mainframe-how-it-runs-and-why-it-survives/ https://arstechnica.com/information-technology/2023/07/the-i...