I/O System

I/O System may refer to:

• DOS BIOS (Basic Input/Output System), a low-level component in DOS operating systems, including PC DOS and DR-DOS

• I/O System (86-DOS), the DOS-BIOS specifically in 86-DOS
• I/O System (MS-DOS), the DOS-BIOS specifically in MS-DOS

See also

• BIOS, Basic Input/Output System
• XIOS, Extended Input/Output System
• CP/M BIOS, the BIOS in the CP/M family of operating systems
• BIOS (disambiguation)
• IOS (disambiguation)
• IOCS, Input/Output Control System

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