In plain English:
Before ADCD, learning JCL, TSO/ISPF, or COBOL was theoretical. Now, a student in a dorm room can run z/OS on a laptop using virtualization (ZDT/ID, Hercules, or z/TPF). ibm adcd zos
The foundational 64-bit operating system known for its high security and availability. Middleware: Typically includes popular IBM software such as Development Tools: Often bundled with or used alongside tools like IBM Developer for z/OS In plain English: Before ADCD, learning JCL, TSO/ISPF,
: Independent Software Vendors (ISVs) use it to showcase their mainframe-compatible products to clients. Licensing and Access In plain English: Before ADCD