diff --git a/revealjs/information-technology/2-products.md b/revealjs/information-technology/2-products.md
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--- a/revealjs/information-technology/2-products.md
+++ b/revealjs/information-technology/2-products.md
@@ -1,11 +1,60 @@
+background-image="img/jannik/soda-heaven.jpg"
# products
* Jannik
- * products and services
- * Twitter
- * YouTube
- * Adobe CC (Photoshop)
- * Hardware
+ * Types of Products and services, examples
+ * Product: a software that you can use on its own
+ * Service: a website or cloud or regulary updates for a software
+
+
+---
+background-image="img/jannik/windows.jpg"
+
+## Windows
+
+
+ * most important software on your computer
+
+
+---
+background-image="img/jannik/video.jpg"
+
+## YouTube
+
+
+ * free web service
+ * upload your videos
+ * self expression: show what you are doing or thinking
+
+
+---
+
+
+
+## Twitter
+
+
+ * free web service
+ * write messages to the whole world
+ * self expression: show what you are doing or thinking
+
+
+---
+background-image="img/jannik/cc.svg"
+
+## Adobe CC
+
+
+ * subscription: pay monthly
+ * updates and new versions for free (when having subscription)
+ * creative tools: video, photo editing, design
+ * cloud
+
+
+---
+background-image="img/jannik/hardware.jpg"
+
+## Hardware
diff --git a/revealjs/information-technology/4-end.md b/revealjs/information-technology/4-end.md
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--- a/revealjs/information-technology/4-end.md
+++ b/revealjs/information-technology/4-end.md
@@ -21,7 +21,7 @@ style="font-size: 24px;"
- *
- *
- *
- *
+ * Unsplash:
+ [Jakob Owens](https://unsplash.com/photos/CiUR8zISX60),
+ [Facycrave](https://unsplash.com/photos/58tOB36ZTnw),
+ [Alexandre Debiève](https://unsplash.com/photos/FO7JIlwjOtU)
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+
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