diff --git a/School/Analyse/Periode 2/Week 1.md b/School/Analyse/Periode 2/Week 1.md
index 5a5f1d8..910b2a0 100644
--- a/School/Analyse/Periode 2/Week 1.md	
+++ b/School/Analyse/Periode 2/Week 1.md	
@@ -46,7 +46,7 @@ While a program waits for IO, other programs can use CPU. This solution requires
 
 Multitasking overlaps IO time of a program with CPU time of other program.
 
-## Multitasking with multiple processors
+# Multitasking with multiple processors
 If computer has a single CPU, programs should take turns in using it.
 
 If computer has multiple CPUS, each task can be given a different CPU.
@@ -54,6 +54,9 @@ If computer has multiple CPUS, each task can be given a different CPU.
 	
 when program issues IO command, cpu is granted to the next program.
 
+# Concurrent vs Parallel
+Concurrent: Fast switching from a program to the next program (context switch) can create the illusion that they are being executed at the same time. -> Logically Simultaneous
+