# System Programmer's Reference

This book is a command reference. It contains examples of Portfolio procedure calls, syntax, and use. It contains these chapters:

- Kernel Folio Calls- Describes the kernel folio procedure calls.
- File System Folio Calls- Lists the file folio calls.
- Math Folio Calls -Lists the math folio procedure calls.
- Event Broker Calls- Lists event broker calls.
- Timer Calls-Lists the Portfolio timer calls.
- International Folio Calls-Lists the International folio calls.
- JString Folio Calls-- Lists the JString folio calls.
- Compression Folio Calls-Lists the Compression folio calls.
- Portfolio Items-Lists the Portfolio items.