1. Operating Systems through Case Studies
General OS model

2. Not shown: The Kernel: The director of the whole production.

3. Applications
UML: The actor is the initiating or reacting element in computation. Actors interact with each other and with the system. Applications, utilities and modules can be actors and users are actors too.

4. User Interface

5. Application Programmer’s Interface

6. File System
In the stage metaphor: Scripts, costumes, props, scenery, technical manuals for all the equipment. Most of the equipment too.,

7. Task Management / Scheduling
Who is on stage, who is coming off, who is getting ready in the dressing room, prompt them for lines etc.

8. Memory Management
Backstage manager: Controls all the stored equipment and facilities.

9. IO and Hardware

10. The actual stage, the footlights, curtains, trapdoors, wings, exits, entrances etc.