Updated README

README.md

@@ -1,10 +1,11 @@
-# Microsoft KnowledgeBase Archive (circa 2002)
+# Microsoft KnowledgeBase Archive
 
-This repository contains all the KB content from Microsoft's FTP archive, circa 2002.
+This repository was initially populated with KB content from Microsoft's FTP archive, circa 2002, and
+then back-filled with KB articles from other sources (eg, Microsoft Programmer's Library CD-ROM).
 
-All 56,989 TXT files have been [converted](scripts/genmd.js) to Markdown files in preparation for publishing
-via GitHub Pages.  The boilerplate legal notices have been removed from the Markdown files, in part to save a
-little space, but they will be restored by the page template that is used to publish them.
+All the original text files have been [converted](scripts/genmd.js) to Markdown files in preparation for
+publishing via GitHub Pages.  The boilerplate legal notices have been removed from the Markdown files,
+in part to save a little space, but they will be restored by the page template that's used to publish them.
 
 A [log file](scripts/genmd.log) records the use of non-ASCII characters.  These haven't been examined yet,
 so it's unclear if the files used CP-437, CP-1252, UTF-8, or some other character set.  In some cases, it might