Glossary
| Term | Definition | Term | Definition |
|---|---|---|---|
| Batch | Running in the background with no user assistance | LRECL | Logical Record Length |
| CICS® | Customer Information Control System; online transaction processing program; running in the foreground communicating with users | LSR | Local Shared Resources |
| CPU | Central Processing Unit; contains the logic functionality and processes the instructions that drive a computer. | Mainframe | Large processors or servers |
| DCB | Data Control Block parameter of DD statement in JCL | MIPS | Million Instructions Per Second |
| DD | Data Definition statement in JCL | MSU | Measured Service Units |
| EXCP | Execute Channel Program | MVS™ | Multiple Virtual Storage; mainframe operating system |
| Hiperspace™ | A virtual storage area (up to 2gigabytes in size) outside the user's virtual address space residing in real or expanded storage and backed up by auxiliary storage | OS/390® | Mainframe operating system (was MVS) (old name - now referred to as z/OS®) |
| I/O | Input and Output | Systems Z | Line of IBM® computer systems running operating systems such as z/OS |
| LE | IBM Language Environment® | VIO | Virtual Input/Output |
| LNKLST | Link List | XPLINK | eXtra Performance Linkage; An IBM performance optimization technique using new linkage conventions |
| LPA | Link Pack Area | z/OS | Mainframe operating system |
| RECFM | Record Format used in DCB parameter of DD statement in JCL |