Epson Progression U12 - Manual (Page 57)

One batch file that you may find particularly useful is called
AUTOEXEC.BAT. Every time you turn on your computer,
MS-DOS looks for the AUTOEXEC.BAT file and automatically
executes each of the commands in the file.
When you install MS-DOS, it creates an AUTOEXEC.BAT file
for you, which you can modify or replace as described above.
Be sure to name the file AUTOEXEC.BAT and store it in the
root directory of the hard disk or diskette from which you load
MS-DOS (You may want to rename your original file to
AUTOEXEC.OLD, in case you need to use it again later.)
See your MS-DOS manuals for more information about creating
and using batch files.
1-38
Using Your Computer