Computer Science › Section D · Operating systems › Topic D.1
The history of operating systems
Every phone, laptop and server runs an operating system, but the first computers had none. Following how operating systems grew, from a helper that loaded one job after another to software juggling many users and devices, explains why today's systems are built the way they are.
In this topic
- Why the story matters
- One job at a time
- Batch processing and the job queue
- Worked example: ordering a job queue
- Interactive and real-time processing
- Multiprogramming and time-sharing
- Worked example: filling the idle processor
- From operators to personal computers
- Multiprocessors, networks and embedded systems
- Common mistakes to avoid
- Key takeaways
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