diff --git a/book/chapter-01-run-and-talk.md b/book/chapter-01-run-and-talk.md
index c944688c..24df5084 100644
--- a/book/chapter-01-run-and-talk.md
+++ b/book/chapter-01-run-and-talk.md
@@ -16,11 +16,12 @@ Angular, Riot, React and HTML are responsible for the dynamic functioning of Gen
 3- The .gtheme extension is responsible for the GeneralBots designer using css and PS technologies.
 A theme is composed of some CSS files and images. 
 
-4- .gbDialog and .gbkb are extensions responsible for GeneralBots communication with the end user. Dialogues are bot services to users.
+4- .gbDialog is extension responsible for GeneralBots communication with the end user. Dialogues are bot services to users.
+.gbkb is package for execution of various types of media.
 
 5- the .gbot extension refers to the generalBots service product.
 
-6- the .gbai is architecture
+6- the .gbai is architecture construction of the GeneralBots application.
 
 ### The Bot Factory