diff --git a/slides/2025-12-20-termin-1-geschichte-grundlagen-html.md b/slides/2025-12-20-termin-1-geschichte-grundlagen-html.md
index c7bcb31..c16a34b 100644
--- a/slides/2025-12-20-termin-1-geschichte-grundlagen-html.md
+++ b/slides/2025-12-20-termin-1-geschichte-grundlagen-html.md
@@ -130,18 +130,6 @@ Programmiersprache "Ada" nach ihr benannt
 <!-- _header: '' -->
 <!-- _footer: '' -->
 
-![bg fit](./assets/hollerith-machine-2.jpg)
-
-<!--
-Hollerith-Lochkartenmaschine, ca. 1910
-US Census Bureau
--->
-
----
-
-<!-- _header: '' -->
-<!-- _footer: '' -->
-
 ![bg fit](./assets/Hollerith.jpg)
 
 <!--
@@ -276,7 +264,7 @@ Verantwortung von TechnikerInnen und MedienarbeiterInnen
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 <!-- _footer: '' -->
 
-![bg fit](./assets/Bletchley_Park_Mansion.jpg)
+![bg cover](./assets/Bletchley_Park_Mansion.jpg)
 
 <!--
 Bletchley Park, England
@@ -659,6 +647,18 @@ ARPANET-Karte 1969
 
 ---
 
+<!-- _header: '' -->
+<!-- _footer: '' -->
+
+![bg](./assets/arpanet.jpg)
+
+<!--
+ARPANET-Karte 1969
+4 Knoten: UCLA, Stanford, UCSB, Utah
+-->
+
+---
+
 # Das WWW (1989)
 
 **Tim Berners-Lee** am CERN (Genf)
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