diff --git a/content/Shoppinglist.md b/content/Shoppinglist.md
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+Conditioner
+Butter
+Oats
+Beans
+Chips
+Cinnamon
+Incense?
+Isopropyl alcohol
diff --git a/content/notes/16-cloud-security.md b/content/notes/16-cloud-security.md
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 ![virtualisation diagram|400](https://i.imgur.com/y9vgful.png)
 
 ## virtualisation within cloud computing
+- makes it easy for providers to run several services on a single physical server
+- efficient use of hardware
+- no idle servers
+- move services from busy server to idle servers to balance load
+- standardised virtual hardware exposed to guest OS simplifies guest configuration
+- guests are segregated
+- deployed using machine image
+	- file containing a bit for bit copy of what a real hard drive would contain if it contained
+		- an OS (usually linux)
+		- a deployment environment (web server, database server, libraries, etc)
+		- the service application/executables
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