Module 0141: What is an operating system?
Tak Auyeung, Ph.D.
November 26, 2008
1
About this module
2
Examples of Operating Systems
3
The layers of an OS
3.1
Device driver
3.2
Protocol/Standard stacks
3.3
File systems
3.4
System calls
3.5
Services
3.6
Sockets
4
But how about security?
4.1
Threat exposure
4.2
Threat limitation