| API | Application Programming Interface |
| AWM | Application Workflow Manager |
| COBOL | Common Business Oriented Language |
| CSV | Comma Separated Values |
| ED | Enterprise Developer |
| EDc | Enterprise Developer Connect |
| EDz | Enterprise Developer for z |
| EMF | Eclipse Modeling Framework |
| ENDEVOR | CA Endevor Change Manager (Environment for Developers and Operations) |
| GUI | Graphical User Interface |
| IBM | International Business Machines Corporation |
| IDE | Integrated Development Environment (in this guide used to refer to ED, EDc, EDz or IDz) |
| IDz | IBM Developer for z Systems |
| ISPF | Interactivity System Product Facility |
| JCL | Job Control Language |
| JES | IBM Job Entry Subsystem (either JES2 or JES3) |
| JES2 | IBM Job Entry Subsystem 2 |
| JES3 | IBM Job Entry Subsystem 3 |
| LPEX | Live Parsing Extensible Editor (in this guide used for an IBM Editor integrated in IDz) |
| MFA | Mainframe Access |
| MVS | Multiple Virtual Storage, used in this guide to distinguish the MVS file system (datasets and members) from the USS file system. |
| OS | Operating System |
| PC | Personal Computer |
| PDS | Partitioned Data Set, if not explicitly mentioned this could mean PDS or PDSE |
| PDSE | Partitioned Data Set Extended |
| PL/I | Programming Language One |
| PO | Partitioned Organized, this term is used for MVS dataset organizations, either PDS or PDSE |
| RDz | IBM Rational Developer for z Systems |
| RSE | Remote Systems Explorer, aka Eclipse Target Management |
| RSED | IBM RSE Daemon, IBM z/OS server for IDz |
| SCLM | IBM Software Configuration and Library Manager |
| SCM | Software Configuration Management |
| TSO | Time Sharing Option |
| SVN | Apache Subversion |
| UI | User Interface |
| USS | z/OS Unix System Services |
| VSAM | Virtual Storage Access Method |
| XML | Extensible Markup Language |
| z | (for IBM products such as System z, z/OS,..) Zero Downtime |
| z/OS | (Zero Downtime) Operating System |
| z/Server | Micro Focus z/OS server for EDc and EDz |