Slightly less brief.

Author: snarkhunter

README.md

@@ -1,4 +1,10 @@
 # MAN_OOF2
 
-The manual for OOF2.
-OOF2 itself is at github.com:usnistgov/OOF2.git
+OOF2 computes the properties of materials, starting from real or
+simulated 2D images of their microstructure.
+
+This is the source code for the OOF2 manual, not for OOF2.  The OOF2
+git repository is at github.com:usnistgov/OOF2.git.
+
+To create the readable (ie, html) manual, see the instructions in
+Makefile.