Similar to DOS_(オペレーティングシステム)
IO.SYS
IO.SYS
MS-DOS
MS-DOS
PTS-DOS
PTS-DOS
Quarterdeck Expanded Memory Manager
QEMMTerminate and Stay Resident
Terminate-and-stay-resident programVirtual Control Program Interface
Virtual Control Program Interface
倚天中文系統
ETen Chinese System
仮想DOSマシン
Virtual DOS machine