Microsoft Disk Operating System(MS-DOS)

  • Developed by Microsoft in 1980 and first operating system for IBM computers in 1981.
  • It is a non-graphical command line operating system.
  • It is a single user operating system.
  • DOS can be loaded in main memory of the computer using a single disk.
  • It is based on character user interface. Communication done by using character between a computer and a user.
  • Here one has to key in the commands on the prompt. Prompt is a place where commands are issued, like C:\ or C:\windows\>

Types of MS-DOS Commands

  • Internal Commands – are those commands which are automatically loaded into main memory when the booting process gets completed, e.g., DATA, TIME, VER, VOL, DIR, COPY, CLS etc.
  • External Commands – are those commands requires external files to be loaded in the computer to run, e.g., Checking Disk, Comparing Disk, Formatting etc.

Programs that controls and interact with Computers

  • Boot record – It is the main program of MS-DOS which includes loading the operating system into main memory.
  • Basic Input/Output System (BIOS.sys) – Provides an interface between the hardware and programs.
  • The MS-DOS.sys program – It is a collection of program routines and data tables that provides high level programs such as application programs.
  • The program – Provides a standard set of commands that gives users access to file management, configuration and miscellaneous functions.
  • Config.sys – Adjust the system according to commands.
  • Autoexec.bat – When the system is power ON, this file execute in automatically command line.

Leave a Reply

Your email address will not be published. Required fields are marked *