diff --git a/modules/pc8080/lib/cpudef.js b/modules/pc8080/lib/cpudef.js
index d9117deff..455334dde 100644
--- a/modules/pc8080/lib/cpudef.js
+++ b/modules/pc8080/lib/cpudef.js
@@ -1,5 +1,5 @@
 /**
- * @fileoverview Defines PC8080 constants.
+ * @fileoverview Defines PC8080 CPU constants.
  * @author <a href="mailto:Jeff@pcjs.org">Jeff Parsons</a>
  * @version 1.0
  * Created 2016-Apr-18
diff --git a/modules/pc8080/lib/messages.js b/modules/pc8080/lib/messages.js
index 763c6ab5f..350938c9c 100644
--- a/modules/pc8080/lib/messages.js
+++ b/modules/pc8080/lib/messages.js
@@ -1,5 +1,5 @@
 /**
- * @fileoverview PC8080-specific message definitions.
+ * @fileoverview Defines message categories.
  * @author <a href="mailto:Jeff@pcjs.org">Jeff Parsons</a>
  * @version 1.0
  * Created 2016-Apr-18
diff --git a/modules/pcjs/lib/messages.js b/modules/pcjs/lib/messages.js
index 85681fdfe..0e58d80c7 100644
--- a/modules/pcjs/lib/messages.js
+++ b/modules/pcjs/lib/messages.js
@@ -1,5 +1,5 @@
 /**
- * @fileoverview PCjs-specific message definitions.
+ * @fileoverview Defines message categories.
  * @author <a href="mailto:Jeff@pcjs.org">Jeff Parsons</a>
  * @version 1.0
  * Created 2014-Dec-11