- String handling
- PL/I compiler options
- Subroutines
- Fetch / Release
- Variable length records
- Storage classes
- Locate mode I/O
- List processing techniques
- Condition handling
- The preprocessor
- Tuning and performance
- Extended addressing capabilities
- PL/I compiler inputs and outputs
- PL/I compiler cataloged procedures
- Stream I/O
- Multi-threading
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