Cat is a Unix tool for concatenating text files. Catena is that basic idea expressed in Mac-like terms.
To use it, simply hit the Start… button. You will be prompted for the name of a new file to Save into. The you will be prompted successively for files to concatenate into the new file. When you have processed all the files you want to concatenate, hit the Cancel button. The new file will be saved where you specified, and your original files will remain untouched on your disk.
