Evolution Of Operating Systems

Various versions of OS until date
  • Efficient file management — DOS helps in efficient file management. The file operations such as creation, editing and deletion of files is easy.
  • Correct environment — It provides the user an environment where user can do input, output and give commands on the command line efficiently.
  • Single user operating system — It can have only one user at a time on the the computer.
  • Space — It has a maximum space of 2 GB.
  • Specification — It is a 16 bit operating system.
  1. The read-only memory (ROM) bootstrap loader reads the Master Boot Record and passes control over to it.
  2. The boot record loads the disk operating system into memory, and it takes control of the machine.
  3. The computer transfers data stored on a magnetic disk to its main memory, the random access memory.
  4. It also transfers data to external devices attached to the computer, such as a computer screen or printer.
  5. The computer provides various application programming interfaces for programs like character input/output (I/O), memory management, program loading and termination, as well as handling input from the user through a keyboard.
  6. The OS also provides file management that organizes, reads and writes files on storage. The files are organized in a hierarchical structure of directories, subdirectories and files.
  1. cd - Changes directory - Type cd c:\techtarget in the command line to change the working directory to c:\techtarget.
  2. cls - Clears all the contents on the screen, leaving only the command prompt - Type cls in the command line.
  3. copy - Copies one or more files to another location - Type copy c:\techtarget\file.txt c:\techtarget\file2.txt to copy c:\techtarget\file.txt to c:\techtarget\file2.txt.
  4. del - Deletes one or more files - Type del c:\techtarget\file2.txt to delete the file file.txt from the directory c:\techtarget.
  5. deltree - Deletes all files and subdirectories from a computer - Type deltree c:\techtarget\drafts to delete the directory drafts, including all files and subdirectories contained in it.
  6. dir - Displays a list of files and directories in a directory - Type dir c:\techtarget to display a list of files and directories in the directory c:\techtarget.
  7. format - Formats a disk for DOS files - Type format e: to format the disk in drive e: for use with DOS.

DOS Vs Windows

DOS Vs Linux

  1. https://www.geeksforgeeks.org/dos-full-form/
  2. https://www.ionos.com/digitalguide/server/know-how/dos-what-is-a-disk-operating-system/
  3. https://techjury.net/blog/what-is-dos/#gref
  4. https://www.educba.com/what-is-dos/
  5. https://www.techtarget.com/searchsecurity/definition/DOS



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