diff --git a/School/Analyse/Periode 2/Week 1.md b/School/Analyse/Periode 2/Week 1.md
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--- a/School/Analyse/Periode 2/Week 1.md	
+++ b/School/Analyse/Periode 2/Week 1.md	
@@ -24,4 +24,15 @@ ADD: add numbers
 SUB: subtract numbers
 JMP: transfers program control flow to the indicated instruction
 
+![[example-machine-lang.png]]
 
+# CPU Time vs IO Time
+Total time required to run program is: CPU Time + IO Time
+
+Typical time to read from IO: 20ms
+Typical time to run instruction: 20ns
+CPU can execute up to 200 million instructions while a block is read from a hard disk.
+
+Conclusion: While I/O is executed, CPU is idling.
+
+![[cpu-vs-io.png]]
diff --git a/cpu-vs-io.png b/cpu-vs-io.png
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diff --git a/example-machine-lang.png b/example-machine-lang.png
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