Editing OS-9 (section)

===Kernel modules===
* Kernel – Contains task switching, memory allocation, and most non-I/O calls
* IOMAN – Handles I/O calls to various file managers and drivers.
*File managers basic set:
** SCF, Serial files (serial devices)
** RBF, Random block (disk devices)
** SBF, Sequential block (tape Devices)
** NFM, NULL devices (USB and other devices)
** MFM, Message
** SPF, Stacked Protocol devices ( Networking)    
** PCF, PC [[File Allocation Table|FAT]] files
** PIPEMAN, [[Pipeline (software)|Pipe]] manager
** Modman - Memory module directories 
* SSM – System security (MMU handling)
* Cache – Cache handling, 
* VectXXX – Vector / PIC handler 
* FPU – [[Floating point emulation]]
* Align – Address alignment fault handler