I would think that you could import it into most spreadsheet programs, such as Excel (as mentioned) or that in AppleWorks. I'm not an expert in Excel on the Mac, but with AppleWorks, I'd recommend creating a new spreadsheet file and using the "Insert" command under the file menu.
It might be readable using a text editor as well. If it's small enough, SimpleText could open it, but otherwise you might have to use something like BBEdit (or import the text into Word or AppleWorks).