diff --git a/guide/sections/part2/operations.adoc b/guide/sections/part2/operations.adoc
index 9539804..0bfd3a3 100644
--- a/guide/sections/part2/operations.adoc
+++ b/guide/sections/part2/operations.adoc
@@ -1,6 +1,6 @@
 === Operations
 
-==== Interoperability with existing systems
+==== Interoperability with external systems
 
 The WIS2 priciples enable lowering the barrier to weather/climate/water data for WMO members.  Lowering the barrier is driven by **international standards**
 for data discovery, access, and visualization.  In addition to Member benefits, a by-product of utilizing standards is being able to provide