There are many file systems defined to work in the IFS. Here we will just list a few of them, so that you get the idea:
| File system | Description | Works Like |
|---|---|---|
| /QSYS.LIB | The traditional "Library file system" | OS/400 |
| /QDLS | The "Document Library Services" (OfficeVision) file system | MS-DOS |
| /QOpenSys | The "Open Systems" file system | UNIX |
| / ("root") | The "root" file system | Windows |
Most of the file systems not mentioned here are for accessing data that is not stored on your AS/400's hard drive, but is accessed on optical media, or on another computer somewhere over your LAN. Rest assured that all of these file systems can be accessed from an RPG program using the same Integrated File System interfaces that we use in this book.