In DOS version 3.3 and later, hides the echo of a batch command.
Any output generated by the command is echoed.
The at-sign can be prefixed to any DOS command, program name, or batch file name within a batch file. The parameters are separated by spaces, commas, or semicolons. When a second batch file completes, control is returned to the calling file. Displays a single blank line on the screen. Use CALL to execute a batch file as a command.