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OBJ (object)

Think of the .o files created when you compile a C program or assemble an assembly program using NASM or the GNU assembler.

  • This is a binary file that is not link edited.

OCSF (Open Cryptographic Services Facility)

  • Software based encryption which uses a plug-in architecture.

OMVS (OpenEdition MVS)

  • This is a predecessor to z/OS Unix System Services. However, OMVS is still used to refer to z/OS Unix system services.

OMVS Segment

  • Iformation stored in RACF that describes a user’s z/OS Unix specific attributes (i.e UID/GID).

OSA (Open Systems Adapter)

Think of the wireless card on your PC.

  • Mainframe network card.