You can export your data from one of the Princeton Applied Research DOS software packages (M270, M352, etc.) a few different ways.  First, you can save your data files in ASCII format (as opposed to binary format; this is changed in the Defaults>Files section), and use the cut/paste feature in a text editor (Word, NotePad, etc.) to paste the desired data into your spreadsheet (i.e., Excel).  You can also use the cut/paste feature in the Princeton Applied Research DOS software to save the X-Y data as a text file, then open it with spreadsheet program.  When pasting text files into a program like Excel, you may have to use the "Text to Columns" feature in the Data menu to select the delimiter for your data set.