DOS Command Rem
Type: Internal (1.0 and later)
Syntax:
REM [comment]
Purpose: Provides a way to insert remarks (that will not be
acted on) into a batch file.
Discussion
During execution of a batch file, DOS will display (but not act on)
comments which are entered on the line after the REM command.
You cannot use separators in the comment except the space, tab, and
comma. To keep DOS from interpreting commands in a comment line,
enclose the command in quotes.
For more information on the REM command, refer to Chapter 6, Tips
for Advanced Users.
Option
comment - Any text up to 127 characters.
Examples
To add a comment to a batch file, enter
REM This is a comment line
To add a line to a batch file and to keep it from being displayed
when the batch file is run, you must first turn the ECHO feature
off. To keep the REM comment line from being displayed, enter
echo off
rem This comment line will not be displayed
This page is from http://www.easydos.com. I pasted it on my website to avoid possible broken links. For further help with DOS commands, Check easydos.com out.