DOS commands are the commands available in MS-DOS that are used to interact with the operating system. Unlike in Windows, DOS commands are the primary way in which you use the MS-DOS operating system.
Are you sure you're looking for DOS commands? If you use Windows (like Windows 7, 8, Vista, XP, etc.) then you have no need for DOS commands because you don't have MS-DOS. The commands in Windows are available from the Command Prompt and are called Command Prompt commands or sometimes CMD commands, but they are not DOS commands.
See my lists of Windows 8 commands, Windows 7 commands, Windows Vista commands, or Windows XP commands instead or you can see a table with every command from DOS through Windows 8 here or the same with more information about the commands here.
Below is a complete list of the nearly 100 MS-DOS commands, commonly referred to as simply DOS commands, available as of MS-DOS 6.22:
The append command can be used by programs to open files in another directory as if they were located in the current directory.
AttribThe attrib command is used to change the attributes of a single file or a directory.
The break command sets or clears extended CTRL+C checking.
The call command is used to run a script or batch program from within another script or batch program.
The call command has no effect outside of a script or batch file. In other words, running the call command at the DOS prompt will do nothing.