MS-DOS Operating System

The MS-DOS Operating System Version 2.11 is a software product designed for the Rainbow 100 computer. It includes support for the "International Call System" for locale-specific date, time, and currency formatting, and supports the Mini Exchange device sharing switch. The system provides core services like file management, program execution, and disk utilities (such as CHKDSK and FORMAT). It also contains DIGITAL-exclusive components like the BACKUP utility, RDCPM for reading CP/M-86/80 files, and the MDRIVE pseudo-disk driver. The document outlines minimum hardware requirements (128KB memory, dual floppy drives), details the warranty terms, and provides information on software support and licensing.