COMP 3000 2011 Week 1 Notes

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Basics

Complexity: computers are complicated, big, fast etc.

UNIX: made to share a computer between multiple people

Need to share:

  1. Disc files: block interface abstraction
  2. Memory: divide it up (virtual memory)
  3. CPU: take turns and cut of those that are being hogs
  4. Network: divide communication into packets (identify with IP for computer and port for the program)

OS: set of code to change computer you have into the computer you want to program, provides a virtual/abstract machine to program hardware (certain abstractions imply certain implementation strategies)

Linux

Kernels: on Android, dvr, home router, servers, the cloud (amazon, facebook, google...)

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