diff --git a/.obsidian/workspace b/.obsidian/workspace
index 6e4efb4..8c8c9f8 100644
--- a/.obsidian/workspace
+++ b/.obsidian/workspace
@@ -9,8 +9,8 @@
         "state": {
           "type": "markdown",
           "state": {
-            "file": "School/NMO/Week 5.md",
-            "mode": "preview"
+            "file": "School/Analyse/Periode 2/Week 1.md",
+            "mode": "source"
           }
         }
       }
@@ -68,7 +68,7 @@
             "state": {
               "type": "backlink",
               "state": {
-                "file": "School/NMO/Week 5.md",
+                "file": "School/Analyse/Periode 2/Week 1.md",
                 "collapseAll": false,
                 "extraContext": false,
                 "sortOrder": "alphabetical",
@@ -87,15 +87,15 @@
   },
   "active": "bc6e8ad9aa0f44c3",
   "lastOpenFiles": [
+    "School/Analyse/Periode 2/Week 1.md",
+    "School/Analyse/Untitled.md",
+    "School/Analyse/Periode 1/ICMP.md",
+    "School/Analyse/Periode 1/Layers/7. Application Layer.md",
+    "School/Analyse/Periode 1/ARP.md",
+    "School/Analyse/Periode 1/OSI Model.md",
     "School/NMO/Week 5.md",
     "School/NMO/Week 3.md",
     "School/NMO/Week 1.md",
-    "School/NMO/Week 7.md",
-    "School/NMO/Week 6.md",
-    "School/NMO/Week 4.md",
-    "School/NMO/Week 2.md",
-    "School/NMO/images/mindmap.png",
-    "Pasted image 20211110185035.png",
-    "School/NMO/images/concept-map.png"
+    "School/NMO/Week 7.md"
   ]
 }
\ No newline at end of file
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diff --git a/School/Analyse/Periode 2/Week 1.md b/School/Analyse/Periode 2/Week 1.md
new file mode 100644
index 0000000..dc5cb90
--- /dev/null
+++ b/School/Analyse/Periode 2/Week 1.md	
@@ -0,0 +1,7 @@
+# Input / Output Subsystem
+Handles devices that allow the computer system to:
+
+* Communicate and interact with the outside world
+	- Screen, keyboard, printer
+
+* Store information
\ No newline at end of file