KB974144, Cumulative Update 1 for SCOM R2: What options do update what components?

Out of the field I do get many questions like:

I want to update the SCOM R2 Console on my workstation. What option do I select in order to achieve that?

Therefore I have written this article about what the selections in the update screen do update what component.

• Run Server Update
  Applies to any SCOM R2 Management Server (RMS, MS), UI, Web Console
  
  
• Run Agent Update
  Applies to SCOM R2 Agent which are typically manually installed. Does NOT apply to Management Servers.
  
  
• Run Gateway Update
  Applies to SCOM Gateway Server Role
  
  
• Run ACS Server update
  Applies to ACS Collector Server Role.