Used to make remarks in the config.sys file.
REM [my remark...]
FreeDOS ignores everything on a REM line.
Use remarks to add explanatory notes to the config.sys, and to disable lines in the config.sys file so that they won't run.
REM Set the last drive letter available: lastdrive=z REM I don't want to use this driver any more: REM DEVICE=FOO.SYS