diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index e246ac1..15e2b92 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -13,14 +13,14 @@
             "state": {
               "type": "pdf",
               "state": {
-                "file": "HCIW/slides/2 Beacon based interfaces.pdf",
+                "file": "HCIW/slides/3b Haptic slides.pdf",
                 "page": 1,
-                "left": -20,
-                "top": 772,
-                "zoom": 0.759521484375
+                "left": -14,
+                "top": 544,
+                "zoom": 1.0802083333333334
               },
               "icon": "lucide-file-text",
-              "title": "2 Beacon based interfaces"
+              "title": "3b Haptic slides"
             }
           }
         ]
@@ -197,11 +197,11 @@
   },
   "active": "6edd4157a160e462",
   "lastOpenFiles": [
+    "HCIW/slides/3Haptic interaction.pdf",
+    "HCIW/slides/3b Haptic slides.pdf",
+    "HCIW/slides/2 Beacon based interfaces.pdf",
     "HCIW/slides/1 User Experience for IoT.pdf",
     "HCIW/slides/1 Interface and Interaction for IoT.pdf",
-    "HCIW/slides/2 Beacon based interfaces.pdf",
-    "HCIW/slides/3Haptic interaction.pdf",
-    "HCIW/slides/3 Haptic slides.pdf",
     "HCIW/notes/2 - Interface and Interaction for IoT.md",
     "HCIW/notes/3 - Beacons.md",
     "Concurrent Systems/notes/4 - Semaphores.md",
diff --git a/HCIW/slides/3 Haptic slides.pdf b/HCIW/slides/3b Haptic slides.pdf
similarity index 100%
rename from HCIW/slides/3 Haptic slides.pdf
rename to HCIW/slides/3b Haptic slides.pdf