<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type"> </head> <body bgcolor="#ffffff" text="#000000"> Randall, In this connection, I have found the following resource useful: FILExt - The File Extension Source <a class="moz-txt-link-freetext" href="http://filext.com/">http://filext.com/</a> I am amused to note that it lists 9 definitions for PDF, only one of which is the Portable Document Format from Adobe. Regards, Ed Taft On 11/26/2007 10:00 PM, Randall Neff wrote: <blockquote cite="mid:a19d72ba0711262200j79bd3cb7w33b57f9593fa9b73@mail.gmail.com" type="cite"> <pre wrap="">I ran an experiment to count the number of different file suffix extensions on my Windows XP PC, to determine how much file format documentation would be required to 'understand' my data. Summary: 1542 different suffixes, and 11512 files with no suffixes in 237,000 files ( 141 Gigabytes). Two page report is attached. Randall.</pre> <pre wrap=""> <hr size="4" width="90%"> _______________________________________________ SCC_active mailing list <a class="moz-txt-link-abbreviated" href="mailto:SCC_active@computerhistory.org">SCC_active@computerhistory.org</a> <a class="moz-txt-link-freetext" href="http://mail.computerhistory.org/mailman/listinfo/scc_active">http://mail.computerhistory.org/mailman/listinfo/scc_active</a></pre> </blockquote> </body> </html>