Join makes one big file of all listed files by putting them together
in the order given. The destination file may not have the same name
as any of input files. You must supply a destination file name. The
original files remain unchanged. Any number of files can be Join:ed in
one operation.
Inputs
FILE -- files to join
TO=AS -- the name of the combined file
Example
Join Text1.doc Text2.doc AS Text.doc
(This will merge the two text files into one.)