diff --git a/docs/platform_basics_brainstorming_2019-04-17.md b/docs/platform_basics_brainstorming_2019-04-17.md
index 2498b765..b9ee0815 100644
--- a/docs/platform_basics_brainstorming_2019-04-17.md
+++ b/docs/platform_basics_brainstorming_2019-04-17.md
@@ -78,3 +78,18 @@
     - Download
 - **Solutions**:  
     - WebDAV/Samba/Docker Volume
+
+# Additional Functions
+
+## Information retrival system
+- **Solutions**: 
+    - CEQUL with CWB Server
+    - Lucene 
+- **Functions/Goals**
+    - KWIC
+    - KWIC with complex querys (POS, NER, Lemma querys)
+    - Frequency lists
+    - n-grams
+    - complex n-grams
+    - etc.
+