diff --git a/README.md b/README.md
index 60b9b72..28ea895 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,4 @@
 # quack
-quack is a small quantum chemistry package which does some weird stuff
+quack is a small quantum chemistry package which does some weird stuff.
+In particular, quack can performed various types of GW calculations (G0W0, evGW, qsGW, etc).
+quack also include a very slow integral package called IntPak which does compute many types of different integrals.