MS-DOS

MS-DOS

1. in charged of managing computer resources

2. commands

   • Unit: indicates which storage unit we are in
   • Dir: shows us two directory and subdirectory
   • Cls: clean screen
   • Copy: copy a file from one directory to another
   • REM. allows to insert comments
   • SET: assign values to environment variable
   • TREE: displays computer content in the form of a tree
   • SEE: shows the version of the Operating System

3. Two sets of MS-DOS commands existed

   • Internal
     • Also called residents, they were automatically loaded at the start of the operating system of the computer
   • External
     • They were stored in temporary files of a transitory type, but they should be kept on hand to be able to invoke desired specific commands.

4. was born in 1981, created as a basic interface for IBM PC personal computers

   • a much more primitive previous version known as 86-DOS or QDOS, belonging to Seattle Computer Products.
   • Version 1.0 of MS-DOS appeared in 1982, along with its pre-installed version on PC products: PC-DOS.
     • It was used massively until the mid-1990s, when it was replaced by Windows systems.

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