Values for DOS critical section number | 
| Value | Description | 
|---|---|
| 
 00h  | 
 DOS kernel, SHARE.EXE, DOSMGR apparently for maintaining the integrity of DOS/SHARE/NET data structures  | 
| 
 02h  | 
 DOS kernel, DOSMGR ensures that no multitasking occurs while DOS is calling an installable device driver  | 
| 
 05h  | 
network redirector | 
| 
 06h  | 
DOS 4.x only IFSFUNC | 
| 
 08h  | 
ASSIGN.COM | 
| 
 0Ah  | 
MSCDEX, CORELCDX | 
| 
 0Fh  | 
IBM PC LAN server (while intercepting INT 10/AH=06h,07h,0Eh) |