Rainbow MS-DOS Version 2.11

This document serves as a user's guide for the MS-DOS Version 2.11 operating system on the Digital Equipment Corporation Rainbow personal computer. It provides a hands-on introduction to fundamental operations, including starting the system, entering commands, correcting errors, displaying directories, and basic file management tasks like creating, printing, copying, and deleting memos using the EDLIN line editor.

The guide offers a comprehensive overview of MS-DOS commands, distinguishing between internal and external commands, and explaining concepts such as file naming, wildcards, and directories. It details the purpose and usage of numerous commands, including BACKUP, CHKDSK, COPY, DATE, DEL/ERASE, DIR, DISKCOPY, FORMAT, MDRIVE (memory drive), PRINT, RDCPM (for CP/M files), REN, SET, SETPORT (for serial port and printer settings), SYS, TIME, TYPE, VER, VERIFY, and VOL. Additionally, it provides in-depth instructions on using special editing keys and control characters for command-line editing and an alphabetical listing of EDLIN commands for document creation and modification. The manual concludes with a section on troubleshooting common error messages and appendices covering diskette handling, reading IBM diskettes, and configuring international features for date, time, and character sets.