Epson 20 - Manual (Page 84)

Some application programs add extensions to the files you create.
These application programs use the extension to determine whether it
is a compatible data file. Avoid using the same extensions as your
application programs. Also, do not use uppercase and lowercase
letters to distinguish between files. MS-DOS does not recognize the
difference and displays all filenames in uppercase.
Certain extensions are reserved for program files. You must not use
these extensions for your data files. The reserved extensions are
.COM, .EXE, and .BAT Files with these extensions are also
sometimes called executable files.
The .BAT extension denotes a particular kind of executable file called
a batch file. Batch files can be used to automate sequences of
MS-DOS instructions. Even if you are not a programmer, you may
want to create some batch files to assist you in your work. A
particularly useful kind of batch file, called an autoexecute batch file
(or “AUTOEXEC” file ) is discussed later in this chapter.
Copying Files
You can use the COPY command to copy individual files or groups of
files. COPY is an internal command; you can use it any time you see
the MS-DOS command prompt. You can also use the XCOPY
command to copy individual files or groups of files. XCOPY, an
external command, is more versatile than COPY. For details about
XCOPY, see your MS-DOS Reference Manual.
You can use the COPY command to copy files in several ways:
l
You can copy individual files from a diskette or the hard disk to a
diskette or hard disk
l
You can copy a group of files using
wildcard
characters
l
You can copy one or more files and give them new names
l
You can combine or merge files into one file.
5-6 Using MS-DOS with Your Equity 386