What is the at sign (@) in a batch file and what does it do?

Question

One remotely familiar with windows/dos batch scripting will recognize this line:

@echo off

For many-many days, I was happy with the sentime

Answer 1

Not only does the "at" symbol placed in the beginning hide the command, it can also be used to append command arguments stored in a text file. The syntax is exe@commands (if I remember correctly)