DOS (Disk Operating System) is first operating system release by Microsoft. Before Microsoft; DOS was released by IBM named IBM DOS. Bill Gates started own company Microsoft and released MS DOS 1.0. Before invention GUI Operating System (Windows) DOS’s last version was 6.22. After DOS 6.22 Microsoft never release MS DOS. MS DOS was a simple and command based operating system. There was no use of mouse in MS DOS. All commands were type able from keyboard. Some MS DOS’s famous commands are still in use in Windows Shell (Command Prompt). There were two types of commands in MS DOS.
- Internal Commands
Internet commands were built in DOS shell commands and do not need any external file. Here are some internal commands.
- DIR
- Get the list of files in current folder or directory
- CLS
- Clears current working screen of MS DOS)
- DATE
- View or change current date of system
- TIME
- View or change current time of system
- REN or RENAME
- Rename a file
- COPY
- Copy a file
- VER
- Get the current DOS version
- MD
- Create directory or folder
- RD
- Remove directory or folder if empty
Note: All internal commands are still supported in Windows Command Prompt.
- External Commands
External commands were not part of DOS shell and need external files same like Windows Library (DLL) files. Here are some MS DOS’s external commands.
- DELTREE
- Remove folder including all sub folders and files
- LABEL
- View or change disk’s label name
- FORMAT
- Format the Hard Disk or Floppy Disk
- CHKDSK
- Run disk check on Hard Disk or Floppy Disk
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